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ONN Coffee

4.2 (65 reviews)
Open • 8:00 am - 4:00 pm
Updated 1 month ago

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Recommended Reviews - ONN Coffee

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Double matcha
Sanj E.

It's honestly overpriced for the size but the matcha is pretty good. The double matcha is almost ~$9 and the double matcha with strawberry puree is ~$10.2 which seems like LA prices to be honest. There is a lot of seating and parking, I went around 2pm and it was not crowded at all.

Strabwery matcha, Snow White salt bread and plain salt bread
Nytasha A.

I went here for the first time today. The staff were so nice and friendly. I wish I got the person's name at the front but she was smiling and was really nice. I got the Snow White salt bread and the plain bread and the strawberry matcha. They were really good. I do wanna try the double matcha next time. The place is also very nice and has a minimalist vibe inside. Definitely worth checking out if you're in the area!

Strawberry matcha. Vanilla latte, mocha salt bread
Jannet C.

Yummmyy- so glad we came! I've been eyeing this place ever since they opened and I'm glad to have come! Inside aesthetic is minimal urban with 1 large table and sit around areas for small groups of 2-3. I was very curious about it the salt bread! We ordered our usuals and the drinks themselves would have been a 4/5- their flavor is mild and the strawberry was a tad too jammy for my liking. what I enjoyed however was the multi salt bread! It came out nice and toasted with a delicious crumble top making the balance sweet and salty 10 /10 recommend! Service was fast is always appreciated :-)

Sitting area
Baylee F.

Great vibes! I went in the morning and it wasn't busy and there's a lot of parking available. A few people in there were just studying or doing work. They were very quick on getting the drinks. I was very excited to try this place since I've seen it all over TikTok. Great drinks, was a little bitter tasting for my liking but I also like my drinks very creamy. But still good vibes, very clean and aesthetic!! Would go again and try something else.

Shop Interior
Rishi C.

When I heard a new matcha spot had opened, I knew I had to give it a try, and I'm so glad I did. ONN is located off Harbor in Costa Mesa, located across the street from the Vons plaza. They've got plenty of parking nearby, so it's easy to get in and out. The inside of the shop is cute and modern, with most of the seating being indoors along with a few benches out front. The staff was nice and quick to serve, they kept the constant line flowing so there wasn't much of a wait. I was excited to see this place serve salt bread, so I tried the ham & cheese and Snow White. Both were really tasty, with the Snow White being a pleasant surprise of salty and sweet (think of it as a well balanced cream puff in terms of flavors). I also tried the double matcha latte (with almond milk) and strawberry matcha latte (with oat milk), and both were great. My only critique on the strawberry matcha is the puree stuck to the bottom of the cup, so it was hard to mix it throughout. Regardless, the matcha quality was very good and the drinks tasted great. Overall, this is an excellent spot to check out, and is a top choice to visit if you're in the area. For being so new they did a great job, and I hope they keep up the great work!

double matcha, no ice
Yiping K.

Free parking in plaza lot right in front is really convenient, though busy on a Saturday afternoon. There was a line outside but it moved quickly and efficiently, with seating both outside and inside which is nice. Ordering at the register was straightforward and they had a menu to scan outside. I got no ice and but didn't mention they would fill the cup 2/3 or I would have just gotten ice. They were able to do less vanilla sweetener for the double matcha and confirmed if whole milk was ok which I appreciated. I didn't wait too long for the drink and saw they were hand whisking. The flavor was great, especially once mixed, and I would come back for the double matcha with ice next time! Note the salt bread was sold out at 2pm so need to get there in the morning to try it.

Outside
Adriana M.

Went for the soft opening and they were busy! The inside is beautiful with a lot of seating available even though it's small! I got 3 drinks -Iced Americano -Vanilla Latte -Strawberry Matcha The drinks were alright! The strawberry matcha was great and I loved the strawberry puree! The iced americano was okay. I know it was the soft opening but I would put the menu somewhere easy to see because since the line was long you couldn't look at the menu until you got to the front. Also when ordering the iced strawberry matcha latte I asked with oatmilk and the person taking orders said that it didn't contain milk?!?!! Which I know it does.

I couldn't wait to try it, so my photo-taking came last lol
Jelly P.

WOW. That's all I can sum this place up with! Their iced double matcha latte and salted croissant are AMAZING!!! Came here by my sister's recommendation, and I have ZERO regrets! Their matcha beats any other matcha I've ever had--and I've been to PLENTY! I go to coffee shops for lattes, and this is hands down THE BEST matcha-latte place! They hand-stir them thoroughly The quality of their drinks is topnotch and their salted croissant (salt bread) is so PERFECT Please check 'em out if you're ever in the area! They've earned their recognition.

Menu
Vince P.

ONN Coffee is a newer coffee shop in the Costa Mesa area serving up some delectable matcha and salt bread. Inside, they have a nice interior and a solid amount of seating. I tried the Coconut Cloud Matcha and really enjoyed the flavor profile. All of the staff here are very friendly and welcoming. I will definitely be back to try some of their other options.

Watching them make it
Lorena G.

Guys, I have to say omg so many good places are popping up but this one is iconic! I went to check it out and the interior is so cute and chill! I ordered the matcha coconut! So refreshing and I will be back! I was watching them make my matcha in front of me. Staff is lovely

Janette N.

OC has so many cafes but Onn manages to differentiate itself. Hand whisked matcha, flavorful and fluffy foams, and freshly baked salt bread. Although it does get crowded, the line moves fast so don't get intimidated.

Matcha
Sophie T.

Matcha cloud drink was good! The matcha top was a bit thick, so you have to mix it with the coconut water a bit - had a great balance of sweetness! The coffee latte was also pretty good! Trending spot but the line is not too long!

Celine K.

tried the double matcha and signature coffee drink with cream and i preferred the coffee. the matcha tasted salty and even after adding vanilla, it didn't help with the flavor. the coffee was alright, they don't make the syrup in house

small a$s cup of matcha.

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