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    Petra Grounds

    5.0 (2 reviews)
    InexpensiveCoffee & Tea

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    Torotea

    Torotea

    4.3(1.3k reviews)
    0.7 mi
    $$
    Locally owned & operated
    Women-owned & operated

    Tapiochi is definitely the highlight of this boba shop! Super tender chewy jelly, have to try the…read morebrown sugar one. The black tea tapiochi doesn't really have any flavor but the brown sugar tapiochi has the distinct roasted taste, which adds more character to the popcorn milk tea. So I got the popcorn milk tea and I feel like that's the only thing I only want from them now. It's a strong toasty tea blend with rich creamy buttery popcorn flavor, tastes just like a cereal milk or almost like a corn milk! A small but cozy hangout spot with some minimal aesthetic decors, it was half packed with teens and adults around 8pm on a Sunday but plenty parking outside. Service was fast and nice. Only complain I have is that this small cup of drink does not really worth $9 to me. They do have some other interesting teas but the price is just little shocking to me.

    I love the jellies at ToroTea. I think it tastes better than boba…read more The popcorn milk tea is a popular drink here, and I do think the buttery flavor is so interesting. But I think I prefer their teas. I like that the specialty ones include toppings already. Mulberry was a bit too sweet for me even though I got zero sugar. I prefer their roasted barley iced tea with osmanthus jelly. Drinks can be easily close to $10. Service is great! Queues can be long. Parking is easy. Bathroom available. Credit card/tap is accepted with no surcharge. I like to stop by when I'm in the area.

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    Torotea
    Torotea
    Torotea

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    Outpost Coffee - Entrance Seating

    Outpost Coffee

    4.4(220 reviews)
    1.8 mi
    $
    Locally owned & operated
    Family-owned & operated

    Visited this place for the first time recently and I'll definitely be back (: tried the strawberry…read morematcha (it's a bit more on the green tea matcha side, not super sweet) and a regular croffle (I could eat a million of these- soooo good!) This team runs so smoothly and efficiently, I didn't wait long and my order didn't seem rushed through. Seating & dining area was neat, tidy and a great vibe overall

    Outpost is a clean and spacious coffee shop. Among the countless amount of times I've been here, I…read morehave been greeted warmly every time by the baristas working there. However, the bar must have been raised too high by the excellent in-house service, because I had an experience that turned my views completely sour. I commented on their Grand Opening instagram post, which contained AI-generated art. My comment was deleted and once I pointed that out, I was blocked shortly after this, within minutes. Now I get that businesses can do as they desire, however, this instantly repulsed me because it feels like they don't care about their community. Additionally, it reflects on them as a business in which they handle criticism, something that is inevitable when you serve the community. (They turned off the comments, as well.) They unblocked me to send me a message the following day, which I included in this review. Go here if you are looking for coffee close to you, but if you care about the full picture such as ethical labor practices, customer service, usage of AI, and attention to detail, I'm not sure if this is the right place for you. Specialty drinks are not cheap, and I'm thankful that Outpost showed me their true colors before I spent even more money here. They reminded me that there are other small family-owned businesses out there who also spend 100+ hour workweeks and don't treat people like this.

    Photos
    Outpost Coffee - Winter Menu! Ube-Ube (left), Outpost Brulee (right)

    Winter Menu! Ube-Ube (left), Outpost Brulee (right)

    Outpost Coffee - Regular hot latte

    Regular hot latte

    Outpost Coffee

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    Grid Coffee - Hot Vanilla Latte to go with

    Grid Coffee

    4.3(598 reviews)
    0.7 mi
    $$

    We recently moved to the area and we're lucky to have such a good coffee spot. We typically order…read moretheir iced latte and cold brew. Both have been great. They use high quality beans. I love their cold brew here. It has depth and doesn't have a generic profile. The service here is good too. The staff here are very attentive and helpful. As for the ambiance of the place, it's like a mini gallery with minimalist decor and huge signature art pieces. It's a good place to get coffee and work. Don't let the small entrance deceive you. It's very spacious. The pricing here is very reasonable. It's also easy to find parking out. It's everything you want from a coffee shop. Although we didn't get to try the pastries, we're sure it's delicious.

    Grid Coffee is wedged between two other buildings (peep my photo)! Located in Diamond Bar, Grid…read moreCoffee brings aesthetics, good intentions, and good vibes. I had stopped by because I wanted to get a croffle for myself. Of course, trying their coffee was also on my to do list. We stopped by on a Sunday morning, and quickly got to place our order. My fiancé ordered their tonic and of course, I ordered their Banana Cream Latte. I also scored their last plain croffle of the day and also got their everything seasoning croffle. It didn't take long for us to get our coffee or our pastry. Their plain croffle was good, but I wished we had the option to have it warmed up. Their everything seasoned croffle was decent if you want a savory pastry. My banana cream latte was strong, but wasn't strong in banana flavoring. I mixed my cream too towards the bottom, and still found barely taste it. The baristas here are also very aesthetic and silly. They had a great time making coffee and taking orders. The art here is stunning. There's also plenty of study space with cushioning available. It's a lovely concept. I think I'll have to come back to try a different drink.

    Photos
    Grid Coffee - Interior

    Interior

    Grid Coffee - Blue lavender latte and strawberry latte

    Blue lavender latte and strawberry latte

    Grid Coffee - Blue lavender latte

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    Blue lavender latte

    Margin Cafe Coffee Roasters - Inside of the cafe

    Margin Cafe Coffee Roasters

    4.5(298 reviews)
    0.6 mi
    $$

    I'm so glad I was able to go to Margin Cafe one last time this past Friday before their initial…read moreclosing on Saturday March 22. I wish the owners all the best! They were always so friendly. The ambiance was always so nice and spacious. Their pastries were also good as well especially when toasted.

    I went to Margin Roasters on a Sunday at around 10:30 AM. Looking for a good study spot with good…read morecoffee, pastries, and WiFi. A few of these expectations were met. For the pastries, it looked like a lot of the ones I was hoping from browsing online were not available. I ended up getting the biscoff cheesecake. It was on the sweeter side but it was very good. For the drink, I ended up getting the banana latte. Been on a streak of getting that lately so wanted to compare with other stores. I didn't get a lot of banana in the taste. At least it had an espresso shot for the caffeine fix and did not taste like the artificial banana. Nothing special there and stand out. For the interior, they had a few seating they primarily accommodated a few groups of four and two. I was able to grab a bench seat that had an outlet. However, there wasn't enough space for my laptop and the items I ordered. WiFi was available but it had a 90 minute limit. The store had a moderate noise level and stayed busy throughout the time that I was there. The service on the order was quick and they do bring it out to you. The store also has their own house espresso which was a medium dark roast. American Express is accepted as a payment option here. Overall, it was a decent work spot. If I come back, I'd prefer to try another drink and hope other pastries are available. Would recommend the biscoff cheesecake for those that want something sweet and the house coffee beans for those that like medium roasts.

    Photos
    Margin Cafe Coffee Roasters - Cold brew

    Cold brew

    Margin Cafe Coffee Roasters
    Margin Cafe Coffee Roasters

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    TP Tea - Tie Guan Yin Milk Tea with Boba

    TP Tea

    4.0(179 reviews)
    2.0 mi
    $$

    I came to charge my car and decided to give this tea spot a try because it looked incredibly busy…read more My thought was, it must be good, right? Luckily, I was right. I ordered the half sweet matcha with oat milk, and it was delicious. The portion size was generous, and despite how busy they were, my drink came out surprisingly fast. I loved that you can order from a touchscreen kiosk and easily customize your drink with all the available add ins. The menu is huge, but the digital ordering system makes it easy to browse and see all your options. The location itself is small with minimal seating, but it has a cute atmosphere and a great vibe. Overall, a solid spot for tea and matcha lovers, and I'd definitely come back to explore more of the menu.

    Convenient and Customizable -- A Solid Go-To My all-time…read morefavorite boba spot was Sunright Tea Studio, but unfortunately it's closed down, so I've been on the lookout for a replacement -- and this place has become my current go-to. What I love most here is the ordering experience. There are multiple large touchscreens where you can fully customize your drink -- sugar level, ice level, add-ons, substitutions, you name it. I almost always go for zero sugar, and the fact that I can do that easily is a huge plus for me. It's the kind of flexibility that modern boba shops should all offer. The portions are generous and the prices are reasonable, which is refreshing compared to some other spots in the area. Is it the most amazing boba I've ever had? Honestly, no -- but the ability to build your drink exactly the way you want it more than makes up for it. There's also a large display screen showing order status, so you always know when your drink is ready. It's a small touch, but it makes the whole experience feel smooth and stress-free. I'll be real though -- I probably drink more coffee from the Starbucks across the street than boba from here. At the end of the day, coffee feels like the healthier daily habit. But when I'm in the mood for something different, this place is where I'll be.

    Photos
    TP Tea - Interior

    Interior

    TP Tea - Creme brulee

    Creme brulee

    TP Tea

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    ChaHalo - Osmanthus Oolong Milk Tea in the large size (only 50 cents more). It was sealed *and* topped off with a lid which I appreciated.

    ChaHalo

    4.5(367 reviews)
    5.4 mi
    $$

    Amazing service and really nice staff! The drinks are really good I really like the roasted oolong…read moremilk

    There are so many tea and boba shops opening now...startups or from Asia, and honestly most of them…read moreare disappointing. Some of the most popular and hyped-up shops have weak tea flavors, yet their wait times and sales are through the roof. Maybe it's placebo, maybe it's the hype...and today, I was invited to try ChaHalo's new Lychee Series, and these are my honest thoughts. (Also the shop is in a busy parking lot with lots of restaurants, stores, and grocery. The shop has very cushy chairs!) I tried all of the lychee drinks at 100% sweetness and tasted them immediately, as the ice started to settle, and again after the ice completely melted and am impressed that the flavors held up through each stage. I'd get them again except for the smoothie. Lychee Oolong Milk Tea: This was my favorite. It's milky with a pleasant sweetness, but neither the milk nor sweetness overpowers the oolong tea or lychee - the flavors were harmonious. The lychee adds just a tiny bit of tartness, while the oolong is fragrant without being too strong and they create a buttery flavor. Lychee Smoothie: This one was my least favorite, but mostly because I'm just not a huge smoothie person unless there's some creaminess to it. The smoothie also melts a little too quickly for my preference. There was a generous amount of house made lychee jelly, and I really liked it. The jelly didn't taste watered down at all. Every sip was smooth and pleasant, and the jelly added both a nice texture and an extra layer of lychee flavor. Lychee Jasmine Lemon Tea: This had a really nice sweetness, and again, the flavors worked well together. The jasmine tea was prominent, while the lemon was mild and added a pleasant fragrance without making the drink too sour. It also wasn't bitter, very light and refreshing. I want to point out: I actually hate the flavor of canned lychee. I love fresh lychee fruit, but canned lychee has a very distinct flavor that I personally don't enjoy. Canned lychee is used at probably almost every boba shop, so it's something to be mindful of when ordering lychee drinks. You should expect that distinct canned-lychee flavor rather than fresh lychee but depends on how the shop uses it. (same with longan) I think ChaHalo used it well. The lychee flavor was noticeable without completely taking over the tea, and the drinks continued to taste good even as the ice melted.

    Photos
    ChaHalo - Signature Drink: ChaHalo Black Milk Tea Frappé

    Signature Drink: ChaHalo Black Milk Tea Frappé

    ChaHalo - Cup with detailed label

    Cup with detailed label

    ChaHalo - Two Jasmine Milk Tea

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    Two Jasmine Milk Tea

    Petra Grounds - coffee - Updated September 2026

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