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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!

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!

Jane L.

Margin Cafe Coffee Roasters is located in Towne Centre Village in Diamond Bar in between Smoke Shop and Nails & Spa. They have lattes, blended frappes, smoothies, traditional coffee, tea, and refreshers. They also have seasonal drinks. Margin Cafe has become one of my favorite coffee shops. Their Biscoff Latte is my go-to drink. It's served iced by default. Excellent latte! Perfect blend of biscoff flavor, espresso, and milk. Service is pretty good. I'm usually greeted upon entry otherwise I'd be greeted at the counter. The baristas are warm and friendly. Drinks usually arrive within a few minutes. There's a lot of tables inside and some seating outside. Usually it's packed with people on laptops. Occasionally, there would be some loud conversations. I absolutely love their Biscoff Latte. I'm always back for more!

Interior

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6 months ago

Fantastic coffee, probably the best Americano I've had (and I drink a lot of coffee ).

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7 months ago

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Business owner information

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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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Margin C.

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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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This place was super yummy! There was adequate space for sitting to either chat with friends,…read morestudy, or work. I ordered the mango Matcha and the banana Matcha Latte, and both were delicious. They were sweet, creamy, and had a rich matcha flavor without being overpowering. The staff were super friendly, and once I ordered, the drinks came out quickly. I'll definitely be back!

I had a good experience at Grid Coffee (Diamond Bar). I ordered the Madagascar Vanilla Caffe Latte…read more($7 - Large - Iced). It's three shots of espresso, milk, and Madagascar vanilla syrup. I felt awake after sipping. It's TASTY, fresh coffee! (Important: Cash is not accepted. Bring Card or Contactless Payment.) I arrived at Grid Coffee (Diamond Bar) on Thursday (around 9:17AM). Parking is easy. The lot is spacious and big. However, this business has awful visibility; it's very easy for new guests to overlook it. But like a strongly guarded secret, this business is POPULAR. Staff is efficient and amicable. Staff is polite and knowledgeable, but Staff is also curt and very focused on crafting their coffee. My coffee took four minutes and 26 seconds. As mentioned, I ordered the Madagascar Vanilla Caffe Latte ($7 - Large - Iced). When thoroughly stirred, the coffee's true flavor blossoms. The potency becomes balanced, and the taste of vanilla & roasted coffee lithely intertwine. The aftertaste is reminiscent of a smoky caramel. There's utility and personality in this freshly brewed coffee. It's easy to understand why this spot is so popular. On ambiance, Grid Coffee (Diamond Bar) is a study/work paradise. Unlike the tiny outside, the interior is unexpectedly spacious. There's about six electrical outlets. There's also customer internet with password; details are in small text on the counter's menu. The location also has about four tables, one long wooden table, and five mini portable tables. In addition, Grid Coffee (Diamond Bar) is clean, well-maintained, and well-ventilated. There's a gender neutral restroom in the back, and the music is chill & calm. The location is filled with working college students whispering about Harvard and preparing for the future. Overall, I found unexpected joy at Grid Coffee (Diamond Bar). The coffee is affordable, good quality, and functional. The location is comfortable and calm. If searching for a wonderful study/work spot, this is a very easy recommendation. 4.8 out of 5!

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Stopped by Outpost Coffee and was impressed by both the quality of the drinks and the attention to…read moredetail. I ordered the Matcha Latte with breve and house cold cream, and it was easily the standout. The matcha had a rich, earthy flavor without being overly bitter, while the breve added a velvety texture and subtle sweetness. The house cold cream took it to another level, creating a smooth, creamy finish that complemented the matcha beautifully. I also tried the Outpost Latte, which was equally well-executed. The espresso was balanced and flavorful, and the milk was perfectly steamed, resulting in a latte that was smooth and easy to drink from start to finish. The café itself had a welcoming atmosphere, making it a great spot to catch up with friends, get some work done, or simply enjoy a quality coffee break. It's clear that a lot of care goes into both the drinks and the overall experience. If you're visiting for the first time, I'd definitely recommend the Matcha Latte with breve and house cold cream. I'll be back to explore more of the menu.

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

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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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Margin Cafe Coffee Roasters - coffee - Updated June 2026

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