Such a cute local coffee spot! I ordered their pistachio outpost and it was so good. I was afraid it would be overwhelming sweet so I got it with 1 pump of flavor instead of 3 and it was perfect. The bits of pistachio on top made it even better! Also ordered their dirty Thai and my bf really liked that one too. For food we had the avo bagel on the jalapeño cheese bagel and the turkey sandwich. Both were delicious! Will be back :) read more

Outpost Coffee - Pistachio outpost and Dirty Thai - Coffee & Tea Near Me - Diamond Bar, California

I came around 1pm on Saturday and immediately noticed how busy it was. Ordered:4/5 Banana matcha: the banana cream top works great with the matcha, however it did seem to be slightly overpowering. The matcha flavor was light but I would be curious to see how the other drinks taste! Vibe: This place is pretty packed with both people chatting and studying. It can be pretty loud, but with headphones, this is a good place to work. Theres plenty of tables but very limited on outlets. Parking: there's a parking lot shared in the plaza. However it can be pretty hard to find. Overall: this place isn't bad and I'm glad I gave it a try. It would be great for a quick catch up with friends. read more

Outpost Coffee - Banana Matcha - Coffee & Tea Near Me - Diamond Bar, California

Came in for a quick caffeine fix after lunch at Mr. Dragon and ended up really liking the vibe here. The space is bright, roomy, and packed with people working quietly on their laptops with headphones on -- almost like a cozy library atmosphere. Ordered the Outpost Latte and it was delicious with just the right amount of sweetness. read more

There's a plaza parking to get here. Inside is sleek and chill. Seems like a great place to meet with a friend or some studying. The staff are nice. The drinks arrived at a good pace. They have some tasty looking pastries that unfortunately I didn't get to try. I got the earl grey latte. The drinks was smaller than expected, especially for the price. I did get the earl grey flavor occasionally. There were hints of the lavender. It was enjoy enough and not too sweet. And it wasn't too hot so you can drink right away. I'd like to try more of the drinks. read more

Outpost Coffee - Earl grey latte (spring menu 2026) - Coffee & Tea Near Me - Diamond Bar, California

I love Outpost Coffee! Their outpost latte is at an ideal sweetness level and the cream top tastes great. The service is quick and their baristas are attentive. The shop is spacious and clean. There's a ton of seating for people to study or catch up with a friend. Wish I could give another star because they are open until 9pm! read more

Outpost Coffee - Coffee & Tea Near Me - Diamond Bar, California

I had an adequate experience at Outpost Coffee (Diamond Bar). I ordered the Ube-Ube Coffee ($7). It's two shots of espresso with sweet ube. The initial sip is refreshing, but the coffee flavor quickly fades. As time passes, the drink tastes like sugary cereal milk. I arrived at Outpost Coffee (Diamond Bar) on Friday (around 11:48AM). The parking lot is big but busy. Fortunately, I quickly found a spot. The sign says, "2 Hour Parking Only - All Day." Staff is polite. Staff quickly took my order and answered my questions. My coffee took three minutes and 25 seconds. As mentioned, I ordered the Ube-Ube Coffee ($7). The caffeine is soft but uplifting. The drink is not bitter nor runny. However, the flavor of sugar and milk dominates the cup. It's not a memorable drink, but it's not bad. On ambiance, Outpost Coffee (Diamond Bar) felt a little worn down and old. The crevices were dusty and the location felt a little messy. There's about three electrical outlet. The location also has customer internet with password; details are posted on the counter. Fortunately, Outpost Coffee (Diamond Bar) has many clean tables. There's about six small interior tables, one long curved counter, and one very long table. The ceiling is tall, so the location didn't feel cramped. Overall, Outpost Coffee (Diamond Bar) is not bad. It feels shabbily maintained, but there's utility. If already nearby, I lightly recommend 4.2 out of 5 read more

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Everything was sooo great! The employees were inviting and the place was super cute & just a great vibe! The mocha was delicious! We also were swooning over the jalapeño cheddar bagel. It was so good that we got a to go order before leaving of more food, coffee, AND matcha Just really enjoyed the overall service, thank goodness for good baristas 11/10 recommend this place!! read more

Outpost Coffee - Coffee & Tea Near Me - Diamond Bar, California

I came here to try their coffee and it was pretty good. I ordered a hot mocha and taste was just perfect to me, better than Starbucks in my opinion. This cafe is a nice place for people to chat with friends or doing their self study. This seems like a popular place for young adults. Overall my experience was okay, would be back again. read more

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**MENU ATTACHED AS OF 03/14/26** Highlights: matcha was great and the indoor seating area has a lot of room! Great place for studying and catching up. There are some outlets available. Unfortunately the croissant I got was dry. Maybe we came on an off day? Just knocked off one star but hopefully I can try again next time I visit! I'd ideally like spots like these to have great baked goods as a little study snack. Parking is a little full but not impossible. Service was great! Baristas in front were very friendly and answered questions especially about the spring menu. Overall, I'd like to visit again especially for redemption for the baked goods. read more

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Such a beautiful space with lots of natural lighting. It seems perfect for a nice catch-up over coffee or work session. For studying, although there are a bunch of seats, there's only three charging ports, so beware! Everyone who helped us was very kind and knowledgeable. We went in the early morning, and we were asking a bunch of questions They met us with kindness and they seemed to want us to have exactly what we wanted. For the star of da show: grapefruit tonic! This drink is incredibly nostalgic for me, as I used to have it all the time in Asia when I was in high school. I have not found a replica until now! The espresso pairs perfectly with the tonic and grapefruit. I love love love that a hint of the grapefruit's bitterness is preserved, and it is just such a well rounded drink. We also got a banana caramel latte, which isn't up my alley but perfect for my bf. He said he was flabbergasted that he could distinctly taste both banana, caramel, and coffee in each sip. I cannot wait to come back and try their other drinks, but I have a new favorite spot. read more

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overall: If the wifi was better, I'd come back again to study. Earl Grey Latte (3.7/5): this was one of their spring specials. I really couldn't taste the earl grey, instead I mainly tasted honey instead. It was also on the sweeter end. Ube-Ube Latte (4/5): The ube was pretty good and paired well with the coffee but the ube tasted a little artificial. seating: good amount of seating available with both window bar seating and tables. good for getting work done. wifi: they do offer free wifi but it was very slow which made it hard to get work done. parking: plenty of parking in the plaza. bathroom: bathroom needs a code that u can get from the cashier but was clean and is in the main building. read more

Outpost Coffee - Earl Grey Latte, Ube-Ube latte - Coffee & Tea Near Me - Diamond Bar, California

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This replaced what previously was Mugs Coffee, and I liked how they redid the seating so it's more open spaced with plenty of bar seating for working. I just wish they had more outlets available and less stools. It was not too busy when I arrived at 2pm on a weekday, and it wasn't too loud which I appreciated for studying. I tried out their signature latte which came with a cream top, it was like a standard Einspanner drink. I'd come back here again if I was in the area read more

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i ordered their ube latte. i wanted to try something different compared to my usual cafe order of getting a matcha. this ube latte was $7 and i was pretty disappointed. it tasted like a regular latte, no ube taste at all. i might as well get the regular one. i did a caffeine pick me up and did do its job. i'm just more upset i paid $7 for a drink and it tasted dissapointing. plus they need to add more outlets in the store because i could only find three and they were all being used. anyways i probably would not come back again there's other cafes nearby that are prob way better. read more

Outpost Coffee - ube latte - Coffee & Tea Near Me - Diamond Bar, California

One of the reliable coffee shops in DB. I used to come here when it was still Mugs so i was surprised it changed to Outpost! However they did not disappoint. Food: 4/5 I ordered their iced matcha latte with signature foam top. The drink came out to around $7.50 or so. Pretty standard pricing for matcha and it tastes pretty good. Although i had only ordered the plain signature foam top i could taste a hint of banana flavor so im guessing the foam pitcher they used wasn't rinsed properly...? I also ordered a hot mocha latte with oat milk. Probably one of my favorite mocha lattes although the size of the drink is a bit disappointing considering the price. Service: 5/5 Service was great no complaints whatsoever. All staff were very kind. Ambiance:4/5 Great study spot with lots of natural lighting. There are plenty of seats but it gets filled often. I enjoyed the ambiance, feels very welcoming and comfortable. read more

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This new coffee shop replaced what used to be The Mugs. Honestly, I like the vibes a lot better. The interior is clean and simple. The service was quick and helpful. The cashier recommended the outpost latte amongst a couple other drinks. The drink itself is pretty good, not sure what it's made of but it tasted nutty. Great place to study/chill with friends. Didn't get any food but they also got food options in case you get hungry or smth. read more

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This is a decent spot to do work/study but there's not many outlets to charge The coffee was just okay but nothing that caught my tastebuds read more

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Outpost coffee was a very nice place to have a meeting or study. There are big windows with lots of natural light. The coffee is really good and they have a variety to choose from. They also have pastries in the morning time. read more

Outpost Coffee - Oat Milk latte - Coffee & Tea Near Me - Diamond Bar, California

I found Outpost Coffee and nice corner spot located in a "circular" plaza that's just hard to many stores if you're new to the area. The coffee shop is designed like an open-concept with bright lighting, and area is more communal than a place to relax or chill. I tried the Ube Latte (had the purple color but very vanilla), which wasn't that great, so I probably should've gone with their specialty drink instead - Outpost Latte. They gave me a sample of the Outpost Latte, and it was much better. The strawberry matcha was okay...sweeter than I would had liked. Overall, friendly staff and may need to stop by again to try other drinks. read more

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I never knew this coffee place was here. It's tucked away in Diamond Bar in a professional building. It's a good sized coffee spot. Plenty of seating and a clean esthetic. I would definitely come here to study or get some work done. Parking is plentiful. They have a good selection of drinks. I went with the Outpost Latte. It is a chicory infused cold brew with a cream. Loved it. Service was great. Staff was friendly and greeted me as I can in. I also got a bagel and cream cheese and it came out perfectly warm and the cream cheese generously spread across it. read more

Outpost Coffee - Outpost Latte - Coffee & Tea Near Me - Diamond Bar, California

Parking is a little awkward, but the coffee is very good! It feels very modern inside as well. We got our coffees fairly quickly after ordering. I enjoyed the flavor, but I wish they offered different sizes. read more

I used to love coming here when it was The Mugs. But somewhat recently they got new ownership. I always used to order a Rose Matcha. Unfortunately they didn't keep it on their menu like majority of the beverages, but they can add rose syrup if requested (old ownership added rose petals at the top). Hopefully they can add something similar one of these days to the menu ;) I also really love their croffles! They're a decent size and super soft. They melt in your mouth! The service is good. Everyone is friendly. Plenty of seating but gets packed quickly. However it is a little one the pricier side. I'd say .75 cents to a dollar more than most places. Other than that it's a great spot to catch up with a friend or get some work done! Lots of nice natural lighting also :) read more

Outpost Coffee - Strawberry Matcha - Coffee & Tea Near Me - Diamond Bar, California

Both the latter and matcha were delicious! My favorite is the caramel banana latte and I ask for less caramel because it is in the sweet side. The place seems like a good cafe to get some work done at least at the time I went. I love natural lighting and considering this place has beautiful huge windows there is a lot of natural lighting! The service was good my drinks were out pretty quickly after I placed the order and the cashier was friendly and patient when I mentioned to her I was visiting for the first time. The bakery items looked so tasty but I didn't try any this time around... I will definitely be coming back read more

Outpost Coffee - Latte and matcha - Coffee & Tea Near Me - Diamond Bar, California

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It was raining a lot recently so I was looking for a cafe to take shelter and get some work done. I stopped by Outpost Coffee on a Saturday at around 12:30 PM. It was really busy at the time with most of the parking spots being taken. After a brief wait to order, I was able to grab a seat at the window. This was a great seat to sit back, get some work done, and watch the rain with the natural lighting coming in as well. There was no outlet near my seat, otherwise it would have been perfect spot. For my order I got the pour over coffee. I really wanted to get a matcha croffle but they ran out at the time. Decided to grab the regular croffle instead. Since it was busy at the time, I was having a hard time hearing the staff call out my name for the order. Since it was a pour over, it took about 15 minutes for it to be ready. The croffle was not too sweet so it went well with the coffee; I do wish it could have been warm instead of cold. This store does have free WiFi. The passcode was available right at the front counter. American Express is accepted as payment here. read more

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Outpost has been one of my favorites ever since it was named "Mugs". Their matcha and cafe lattes have never let me down. With unique seasonal items and daily pastries they have been a go to without a doubt. Sometimes staff is friendly while other times they are quiet and reserved. Regardless the drinks are always good and it is a great place to study. read more

Outpost Coffee - Blueberry Matcha - Coffee & Tea Near Me - Diamond Bar, California

Visiting from out of town and was getting ready to head back home. I wanted some coffee but love trying local places. I searched what was near by and this was right off the freeway. I got the banana latte and it was great. I got it with the banana cold foam. I also got the guava and cheese danish. The inside is cute and the service was fast and friendly. There was alot of people in there and some sitting at tables working. Seems like a popular local spot. Would visit again read more

Outpost Coffee - Banana Caramel Latte - Coffee & Tea Near Me - Diamond Bar, California

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I've never been a regular anywhere but I've been coming here once a week. So, maybe not a regular but pretty consistent for someone who usually never visits the same cafe again. I tried the seasonal pumpkin spice drink a couple of weeks ago and it wasn't my favorite but I'm glad I tried it. It's one of the three seasonal drinks right now and while it had a good pumpkin flavor, it was too spice-forward. I think it's worth a try though, if you don't mind it having a strong nutmeg profile. However, last week I came back to try a few new drinks in addition to my favorite (the outpost latte). I was shocked by how good the Spanish latte was. The espresso was strong, but it was complemented well by the condensed milk and had a very smooth taste. It was also rich and creamy in the best way without being too sweet. I tried some of the blueberry matcha, but it wasn't my favorite for personal reasons since I usually prefer plain matcha lattes. I think they did a good job of making it with the right ratio, though, because I could taste the blueberry without it overpowering the matcha. I also think they whisk it by hand, so maybe it's worth a shot to try it again but with a cream top. read more

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A cute coffee shop in diamond bar - has a lot of unique coffee I truly enjoyed their outpost latte which has sweet cream on the top with not-so sweet coffee on the bottom which makes a really good balance My husband tried thai iced tea latte and he really liked it as well as cappuccino. I also bought their beans for espresso - not my favorite as it has a lot of citrus flavor. It is inside a plaza with enough parking and open for long hours. There are a lot of seatings inside as well read more

Outpost Coffee - Outpost Latte, Cappuccino - Coffee & Tea Near Me - Diamond Bar, California

Chai and Matcha are very strong and tasty! I came during the night and it's not as busy which is nice. This is my second time coming back this week I can't get away from their drinks. read more

Outpost Coffee - Chai and Matcha Latte - Coffee & Tea Near Me - Diamond Bar, California

Pretty small coffee spot that is located in a pretty big plaza They're open daily 7am-9pm Parking was ok since there was plenty of parking but it could be difficult since it's shared with many other businesses Menu had a good variety of coffee and matcha drinks, as well as croffles, sandwiches, and bagels. Prices were reasonable and most drinks were $6-$7+ They have milk substitutions for an extra $1 and additional syrup for +$0.50 Inside was pretty small but it has plenty of seating. However, I wish it had more power outlets! It was nice there was free WiFi! The Outpost Latte ($6.75) was pretty good and sweet. The coffee was quite strong and creamy. It was a little too sweet even though I asked for half sweet and less ice. This was 7/10 Overall, this was an okay study spot and the coffee was not bad read more

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Came to this coffee shop on my way home and got a banana matcha . The matcha was good but I didn't taste a lot of banana I wish there was more of that . The matcha wasn't as creamy as some I have tasted but was still really good . The inside had a lot of seating . Service was good as well . read more

Outpost Coffee - Banana matcha - Coffee & Tea Near Me - Diamond Bar, California

Good coffee! Very cute cozy shop! Staff really nice! We got the honey oat and it was really really light and good!! Loved that coffee definitely memorable. We also got a tea and that was mid. But I'd be back here when in the área! read more

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Service was actually great, super friendly staff. As my first time here I had questions and they were able to answer in a friendly matter. Coffee is delicious and their bagel jalapenos and cheese woo! I did ask to try their popular drink Outpost house coffee. Chill vibe, seems there's a lot of students studying. read more

Outpost Coffee - Coffee & Tea Near Me - Diamond Bar, California

Came here with a friend, it was both of our first times and we were so happy with everything :) The staff were very friendly and helpful. They even gave my friend a sample of the Outpost latte, which she ended up ordering! Our orders did take quite a few minutes (we came at peak lunchtime), but it was worth the wait! She said she enjoyed her coffee and sandwich! I had the Thai tea + espresso, it was the perfect blend of sweet and creamy, with the caffeine boost I needed! My avocado toast was so perfectly crispy and refreshing! I will say it was slightly on the lighter side with very little avocado for the price, but because the taste was so amazing, it was a good trade-off The only downside is the tables are small, so if you're planning to study, sit at the long counters running along the wall and across the center of the cafe read more

Outpost Coffee - croffle sandwich, Avo Toast, Outpost Latte, Dirty Thai latte (Thai tea + espresso) - Coffee & Tea Near Me - Diamond Bar, California

I used to come to this coffee shop when it was called The Mugs . As a coffee lover, I love trying new shops. The menu has a good selection, Coffee, latte, tea, macha. They also have a speciality drink list. The barista recommended me the "Outpost Latte" and even let me try a sample of it. Cold Brew with cream foam and expresso powder. Oh yes, that was yummy and hit the spot. My friend ordered the Strawberry Matcha latte. I did see they have cute pastries and bagels. I was too full to order it but I'd love to come back and try it next time. I love the aesthetic and ambiance. There are lots of natural lights around and great to take photos. friendly service and quick with the drinks. read more

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After eating kbbq down the street with some friends, we wanted to try out a new matcha place and this place came up on yelp. It had great reviews so we set off to try it. Its pretty spacious inside but there were so many people there studying/working - which is pretty neat if you need a space for that. my husband tried the yuzu sparkler & it was so good. I got the matcha lemonade and was very surprised with the taste. I just don't like that the restroom is outside in like the hall area. It was kind of scary/sketch getting there. read more

Drinks: Outpost Latte - chicory-infused cold brew latte, topped with house made cream and espresso powder (all made from scratch); Banana Matcha has a nice blend of the banana flavor with the matcha Service: friendly, everything is made-to-order Design: interiors has a nice upgrade with the white marble-like bar counter and travertine-like walls Overall: if you want great coffee, espresso & matcha/tea drinks in a nice relaxing vibe, then support this local coffee shop read more

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Was in need of a quick pick me up on my way to work in the morning and decided to stop by Outpost Coffee. Plenty of parking available, though I do see how it may be an issue later in the day as the parking lot is located in a plaza with many other business. The inside was nice and bright. I really enjoyed the big windows that allow for a lot of natural light to come in. It was small inside but plenty of seating. I could definitely see myself doing some work in here. The baristas were very nice and my Banana Caramel Latte was finished quickly. Banana Caramel Latte 7/10 - not too many coffee shops offer a banana latte so when I saw this on the menu I had to give it a try. The latte was good and sweet. The banana flavor was very pronounced, so if you really like a strong banana flavor then I recommend this. I'm someone who prefers coffee that's not so strong, so if you prefer your coffee stronger then maybe try something else on the menu. Overall a great experience and I can definitely see myself coming again to try other items like the Banana Matcha! read more

Outpost Coffee - Banana Caramel Latte - Coffee & Tea Near Me - Diamond Bar, California

The avo bagel on an everything bagel is to die for! The truffle salt sprinkled on it is a huge game changer. This is my favorite place in the area to have a work session. read more

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Outpost Coffee is a coffee shop located in Golden Springs Plaza in Diamond Bar. This coffee shop replaced The Mugs. They have signature lattes, espressos, espresso tonics, pour overs, matcha, tea, refreshers, croffles, sandwiches, and bagels. I ordered the Outpost Latte which is a chicory-infused cold brew with cold foam on top. Excellent latte. Cold brew ran smooth with the cold foam adding some rich and creamy sweetness. The chicory part of the drink also added a nutty and earthy flavor. Coffee was pretty strong as I think my heart catapulted to the sky halfway through the drink. Service was interesting. I was greeted upon entry and then helped by another barista a few moments later. As I was typing in my phone number to sign up for rewards, they cleared out of my screen from their end so I didn't get a chance to sign up. Then when I selected to text my receipt to my phone number, they also cleared out my screen from their end so I couldn't get a text receipt. I had to ask if I can get a receipt. The barista was totally friendly but the process felt rushed. Anyway, my drink arrived within a few minutes. It was packed inside with people on laptops. There's a giant communal table and window seating available. Whatever song was playing was thumping quite loudly. Parking was pretty packed in the plaza. There were a few spots open. I absolutely enjoyed the Outpost Latte. Service was friendly but felt a bit rushed. Still, will definitely be back for another visit! read more

Outpost Coffee - Outpost Latte - Coffee & Tea Near Me - Diamond Bar, California

Outpost Coffee is such a great spot to study and unwind As soon as you walk in, you notice how spacious it is, with lots of people studying or working, but even when it's full it still manages to keep a calm, quiet ambiance. They also have a great variety of coffee drinks to choose from. I ordered the crème brûlée latte, and it was hands down the best choice for me--you still get that rich espresso flavor with just the right amount of sweetness, not overpowering at all. My boyfriend tried the banana latte, and it wasn't really his favorite after a while because the syrup tasted a bit artificial, but that could just come down to personal preference. Service was fast, and overall the experience was great. I'd definitely come back to grab another coffee and spend some time studying here again. read more

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