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Margin Cafe Coffee Roasters

4.5 (300 reviews)
Updated 2 months ago

Margin Cafe Coffee Roasters Photos

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MARGIN CAFE COFFEE ROASTERS ATMOSPHERE

What's the vibe?
Moderate noise
Outdoor seating
Dogs allowed

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Recommended Reviews - Margin Cafe Coffee Roasters

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Biscoff Latte ($5.50 - 12oz - iced)
Ian A.

I ordered the Biscoff Latte ($5.50 - 12oz - Iced). It's not punchy; rather, this coffee felt subdued and silky. It's not too sweet nor bitter. The aftertaste is a crumbly caramelized cookie. (Important: Cash is not accepted. Only card. Also, they have a 90 minute policy. If you want to stay longer than 90 minutes, management wants you to purchase more.) I arrived at Margin Cafe (Diamond Bar) on Thursday (around 12:15PM). Parking is easy. The lot is big. Staff is curt, busy, and business-like. Staff explained that the 12oz coffee and the 16oz coffee had the same number of shots; I chose the 12oz, so it wouldn't be diluted. My drink took six minutes and 36 seconds. As mentioned, the Biscoff Latte ($5.50 - 12oz - Iced) is not bad. It's not too milky. And it's not bitter nor too sweet. It's also fairly affordable compared to other quality spots. However, there's a lot of ice, so the drink vanishes fairly fast. The caffeine is not strong, but it's enduring. Regarding ambiance, Margin Cafe (Diamond Bar) is sleek but fairly unmemorable. There's about four electrical outlets. Also, there's customer internet with password. Unfortunately, the 90 minute time-limit feels constraining for this place to be a good study/work spot. Also, the music is fairly loud; it's like management wants to scare away loitering college students. Fortunately, there's a gender neutral restroom in the back. Overall, Margin Cafe (Diamond Bar) offers decent coffee. It's not the best, but it's an affordable, solid option. Location feels a little frugal, but there's sincere potential hidden in these walls. 4.4 out of 5

Horchata latte (left), biscoff latte (right)
Jasmine C.

It is a cute coffee shop in diamond bar. Has a lot of unique drinks which I like. My husband got a horchata latte as he wanted a hot latte yet most of specialty drinks are not available in hot and I got a biscoff latte. We liked how the drinks were not too sweet but still had those unique flavors. It was our first time at the cafe and the person who worked there explained and recommended drinks for us which I was grateful for :) It is located in a plaza so there ate enough spaces for free parking

Wifi
Nicki A.

We came here for a quick morning study date and enjoyed the ambiance of the space - it was spacious, quiet but with nice music, and had lots of outlets to plug our laptops into. The bathroom was also really clean! The servers were nice and accommodating, serving us even though their payment systems were down (they don't take cash but thankfully the systems worked before we left so we were able to pay) We got some baked goods and ordered Biscoff Latte and Vienna Latte with cream top. Baked goods were solid and the drinks were yummy and well-concentrated, not watered/sugared down. Would love to come back for another study date here!

Xenia A.

Came to this spot to do some work with my friend and it was a nice spot for a good cup of coffee and pastry. The seating was also quite comfy, I'm kind of a chair snob and hate when coffee spots have chairs that leave marks on your legs. The butter pecan iced coffee was pretty yummy as well!

Biscoff Late
Lexy A.

This was my first time in Diamond Bar so I can't compare this spot to other shops in the area. However, I can compare to the coffee shops in LA. I got the Biscoff Latte and loved it!! They have whole milk and non dairy (no 2%). The latte was the perfect amount of sweet. The Biscoff flavor is there and not too overpowering. There is a good amount of indoor and outdoor seating. They have wifi as well. They have a sign that requests one drink per person if you're dining in. Also that if you are staying more than an hour, to order more drinks. Not sure how much this is enforced.

Timmy S.

This coffee cafe is located in a small plaza. I was in the area and stopped in for an iced drink on a near 100 degree afternoon. They have several outdoor tables (thanks, but not on this hot day!) and a dozen tables indoors. I ordered a Biscoff latte (only offered as an iced drink) and a slice of Biscoff cheesecake. The smiling young woman who took my order let me know she would bring it to my table when it was ready. It wasn't very busy but it took about 10 minutes for my order to be brought out. The Biscoff cake was really delicious. The Biscoff crust and sprinkles of crumbs on top were wonderful and the cheesecake was creamy, light, and slightly sweet. It has a whipped cream texture. I truly enjoyed this. The Biscoff latte was a bit of a disappointment. I could see it being made and a jar of Biscoff cookie butter was used as an ingredient (although I couldn't see how much). Oddly the latte visually looked like it had the cookie butter but there was no taste of Biscoff at all. The coffee flavor was very bold and was all I could taste. Fortunately, I really liked the taste of the iced latte even though the Biscoff flavor was completely absent - I still enjoyed it. I appreciated the signs they had up on the walls advising customers to be considerate and, if they were going to camp out with their laptops in the shop, to please, at least buy a second drink. It appeared to be effective as there were plenty of tables available for paying customers. 3.5 stars rounded up.

Taken 8/24/2025
Jennifer F.

Fantastic cafe!! I searched coffee places near Diamond Bar and I selected this cafe for an early morning talk with my friend. I ordered an iced Blueberry Latte with soy milk and my friend ordered their Coconut Latte. Drinks came out fast and arrived on a cute small tray. There was plenty of seating. We had a great time catching up. The interior was beautiful and they even had a restroom! My drink was so delicious, it tasted like a blueberry muffin, but with espresso! I really enjoyed my time here, I can't wait to come back!

Menu
Edward C.

A friend of mine had posted about this cafe and I've never known about it! Easily overlooked and definitely a gem. The owners are very friendly and willing to educate about coffee and their drinks. The Biscoff latte is unique and not overbearing. Plenty of indoor seating as well as some outdoor seating. Will definitely drop by more time allowing as it's in a convenient location. The interior is very cozy and well decorated. Good to enjoy coffee and do some work or read a book. Great place to relax and enjoy some good coffee.

Almond croissant
Sherry T.

I've been coming here since they first opened and really enjoyed their coffee, drinks, and pastries. It's a cute coffee house with good amount of seating both indoors and outdoors. It's located in a plaza with lots of parking. This time I ordered the mango matcha (seasonal item), and it was A.Mazing! The mango puree was fresh and not too sweet. It paired so well with the matcha (which I have never had)! Both the Nutella and almond croissants were yummy I definitely recommend this place.

Rho L.

I might be the minority here but I wasn't impressed with Margjn. I ordered the black sesame latte and the black sesame croissant. The croissant seemed days old even after it had been warmed and the latte was very underwhelming in flavor. I may try to visit again and order different offerings.

Coconut Latte w/ Oat Milk.
Kevin M.

A great coffee shop with quick and friendly service! I've come by to Margin Cafe a few times during a needed break time and place to chill to do some work on the computer. The cafe has adequate indoor and outdoor seating and plenty of parking spaces nearby. The few times I've come here there are usually customers already working or studying at the tables. It's very quiet and you can get plenty of studying or work done in peace. FYI, the location offers free WiFi for 90 minutes with one purchase minimum if you plan on staying. I've ordered a Coconut latte and Matcha latte during my few visits. The drinks were tremendous. The drinks were prepared quickly and I had no complaints. I've been drinking matcha lately and theirs was excellent. I'd bookmark Margin Cafe if you want a nice place to have a cup of coffee or study in Diamond Bar!

Interior
Guisselle D.

I really enjoyed the vibe of this place. It's very spacious inside with lots of seating options so it's perfect for studying. We aren't from the area but happened to stumble across this hidden gem. We didn't realize they were closing in 10 minutes but been the the person working gave us her undivided attention and did not make us feel rushed or unwelcomed I wanted to try something I've never had before but it wasn't really my style. That being said, I am more than willing to come again to try a new drink and the pastries (they look soooo good!!!!)

Rose petal latte
Silver P.

So far I love this cafe, a husband and wife coffee shop that gets their beans roasted locally and bake their own cakes Got their standard ice coffee and it's more of a darker roast which is perfect for milk additions. Currently tried their seasonal drink, the rose petal latte and it's not too sweet and perfect! Their jalapeño croissant is delicious and I also love that they're pet friendly. (Cats too!) Such a cozy cafe and the service is so calming and friendly. They also do collabs so I'll be looking forward to coming here again!

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Margin C.

Thank you Cindy! Hope to see you soon!

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2 years ago

Location closed at 5 pm, so we did not get a chance to try this spot. Hopefully we can in the future!

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Page 3 of 8

Ask the Community - Margin Cafe Coffee Roasters

Do they close early on Saturdays? I'm here now and Yelp says they close at 5pm but it's closed now -_-

Closed on Saturdays? Bummer?

Only this weekend. We have to attend a memorial service of our family. We apologize for any inconveniences caused.

Are there outlets available?

Yes but it's limited.

How does the painting option work?

Painting package includes all material and supply, and a free refill on your drink. 2hr package is $38/person or $68/2 people.

Don’t See Your Question? Ask Away!

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Coffee and matcha: 10/5 -creamy, rich, not too sweet…read moreService great -coffee gets made fast Vibes good - good for studying, seating got cushions now Come here at least one every week

This review is LONG OVERDUE! :) I've been coming here since December 2021 & it's hands down my…read morefavorite coffee shop in Diamond Bar. I'm a matcha person so I've only ever gotten their matcha, and if not just their strawberry hibiscus (no longer served), herbal tea, and strawberry milk. I love their selection of matcha: strawberry with chunks. One of the best I've had! Their blueberry matcha is pretty delicious also. The customer service is great. Everyone is kind and efficient. I'd say the baristas kind of keep to themselves though and aren't overly enthusiastic. But overall, still welcoming & nice! The atmosphere is simple with wood seating areas. I like it. However sitting for a long duration can be a little uncomfortable since there's not much back support, but luckily they have a basket with padded pillows to sit on. Recently they added tables along the corner nook area which is great! Aside from that they have little tray-like table tops to set your drinks on or laptops/books/etc; while working. There's also plenty of outlets which is a plus. Not to mention they always seem to have a good playlist goin' :) Oh! & they have outside seating as well underneath shaded umbrellas. My only complaint is it gets really hot in there during the hotter months. Especially since they're facing south and catch all the direct light early on in the day. Don't get me wrong, I love the natural lighting! It's just more prone to getting hotter & I'm not sure if they have A/C. I'm sure they probably do but it's never been exactly cold in there like most coffee shops, mainly room temperature. All in all Grid is a great spot! I highly recommend :)

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Had to make my 1000th review count, so naturally I chose Torotea, the place that keeps my tea…read moreaddiction thriving. I usually hit their San Marino spot, but this location still delivered the goods. The shop's a bit small inside, but service was nice. Grabbed my ride-or-die Koan-Im Oolong Latte and paired it with a donut from my favorite donut shop like I was assembling the perfect duo for a late night snack. The tea was lightly sweetened perfectly to my liking, smooth, and clearly crafted by someone who respects tea leaves more than I respect my sleep schedule. The cloud top was basically dalgona candy foam and felt like a bonus dessert after finishing the drink. Even with a lot of people waiing, service moved fast, in & out in about 7 mins. Quality tea, speedy service, and enough creamy foam happiness to make a milestone review feel deserved!! Highly recommend!!! Now for some poetry that's inspired my 1000th review: Warm glazed memories sift through my reverie. A pink box opened in the summer of 24. Days were bleak and hollow like a bakery shelf at closing. I saw the saddest eyes, soft as powdered sugar falling. Sweet like a dalgona cloud top koan-im oolong latte, but carrying a quiet ache no frosting could hide. That summer you saved me, like the first bite of something new when you thought you'd forgotten what butterflies felt like. The season changed and you suddenly disappeared.... just an empty pink box on the counter. Only crumbs remain now, where your strawberry-glazed humor used to melt into every moment like sugar on warm dough. My heart split like a jelly donut. Still, I'm grateful as the world is as it should be. I pass by the donut shop on 66 and smile. People think it's just about donuts. But once.... a long time ago, one saved my life. Děkuju, na shledanou, měj se via.

"a luxurious mix of our pure and umami Japanese matcha embraced by our smooth and velvety vanilla…read morecloud, frothed freshly in house" Now DOUBLE the Matcha latte with Matcha Cold Foam Cream. Matcha Einspanner was so yummy and matcha concentrated that I enjoyed it very much. Torotea has well crafted drinks and I appreciated the samples!

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Love this little bagel shop! I have been coming here for years now & they always are always…read moredelicious! The staff is nice! They now have an order on screen menu/ option but still can order the old school way too I always get the avocado bagel it's my go to fave thing! I will say I liked it more when they paired it with a side salad they had this yummy vinaigrette sauce along with it, now they just give a scoop of potato salad which wouldn't be my first choice lol so I usually leave that behind. I have tried the pastrami which is also good! Go early cause they don't have a lot of bagel options or baked goods after 11am! Italian sodas a must! Especially since I'm not a coffee drinker! Will be back soon

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Too hot in the afternoon yesterday to take a walk or to stay outside so it was wonderful to sit…read moreinside WYWH and enjoy my iced tropical tea with agave as I read my latest novel. I had finished my errands of my day off from work and really appreciated the time to relax. My husband joined me there after his work and from there we continued with our adventure in downtown Pomona (see The Rookery and Game Nights). Even on a Tuesday at 3 p.m. there are locals hanging out, enjoying the space, the music, the coolness (in both senses of the word). The staff here is always friendly and accommodating. They select the music so it's different depending on the barista. I took photos of a couple intriguing flyers from the Pomona community on the table at the front doorway.

This is my daughter's favorite coffeeshop in here area…read more.. This past Saturday she took me here. As we approached the smell of the coffee was beautiful! the space was scattered with a variety of seating... booths, tables, couches they had QR code menu + digital menu... daughter and both got the bourbon caramel iced and shared a breakfast sandwich. oh wow ...i was pleasantly surprised at how yummy it all was! they have a counter set up with to go boxes, napkins, water etc... to help yourself...love that! also i guess it switches from a coffee shop to a bar at 5 pm...genius! not sure if alcohol is available before 5 and coffee after 5...i would be curious to find out. def will come back to check out the evening vibes

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Aroma Craft Coffee - Aroma Trio

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Margin Cafe Coffee Roasters - coffee - Updated May 2026

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