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Best Peanut Butter and Chocolate Brownie in Cardiff

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Quantum Coffee Roasters
90/100 (2271 ratings)
Quick Bites
Coffee & Tea
Coffee & Tea
Cafe
Contemporary
Gluten Free Options
Cafe
Contemporary
Gluten Free Options
Breakfast
Lunch
Brunch
Drinks
Coffee Cake
Long Black
Cakes
Toast
Root Beer
Waffle
Thai Tea
Espresso
Ham and Cheese Sandwich
Brownies
Camomile
Fab Coffee
Flat White
White Mocha and Cappuccino Slice
Latte
Blueberry Muffin and Nitro Cold Brew
Mochi
Peanut Butter and Chocolate Brownie
Toast
Iced coffee
Juice
Waffle
CafƩ
Contemporary
CafƩ
Seating
Wheelchair Accessible
Highchairs Available
Free Wifi
Accepts Credit Cards
Takeout
Drinks
Brunch
Breakfast
Lunch
Cheap Eats
"When it comes to coffee these guys know their onions! Having spent a couple of hours in Quantum chatting with the owners I quickly came to realise..."
Dan Reed
"A brand new find has become my new favourite coffee shop. Stylish cool decor and very friendly service. The coffee tastes amazing. I recommend ..."
Gareth Farr
"Fantastic staff with fantastic coffee, probably one of the best coffee shops in Cardiff..."
Chris Barroccu
"Knowledge and friendly staff. Had the best drip coffee that I've had in Cardiff. Clean, fresh and expertly prepared. Happy coffee..."
Paul Regan
"Great coffee, great service, and awesome to see them using Oatly barista too.. highly..."
Iona Hannagan Lewis
"Passionate coffee aficionados. Would recommend stopping by for a cortado or any of the single origin on offer, choose from V60/Chemex etc.. Great..."
Jake Vladimir Downes
"Amazingly lovely artisan coffee experience with the friendliest, most welcoming and knowledgeable hosts you could ever wish to meet. Such a relaxed..."
Simon Scrivener
"Extemely friendly staff, brilliant hot chocolate made from real dark chocolate, comfy chairs and great..."
Cassidy Reglin
"Apart from excellent coffee, they now have best tasting..."
Dimitris Moraitis
"Fabulous coffee and d licious cakes in a chilled coffeehouse. Just what we..."
Steve Lake
"I work from home and very often will spend the bulk of my day in Quantum. I don't drink coffee but there are plenty of positive reviews about the..."
Leon Ward
"best coffee in cardiff. really nice atmosphere and the dude knows his..."
Ems Davies
"Great coffee. Great tea. Great food and great..."
Gary Metcalfe
"One of the best Coffee Shops I've been to, end of. Friendly, clued up staff, wonderful lighting and sockets everywhere. An awesome addition to the..."
Lewis Jelley
"Nice cafe just round the corner from Cardiff Bay. Friendly staff and very relaxing atmosphere. They carry a variety of beans although they are for..."
G C
"We had a good experience over there. Flat white has a good balance and V60 on Chinese beans was also good. Thank..."
Natalia Shabalina
"Lovely and atmospheric coffee place in the heart of Cardiff Bay. Flat white circa..."
maya K
"Lovely coffee shop with friendly staff and really nice coffee, I was shocked that a flat white was Ā£3, when Costa serve up an inferior one for..."
NGW
"I had a pleasant time in the cafe. Wonderful Nitro Cold Brew with delectable blueberry muffin. The overall atmosphere felt cosy and the baristas were..."
Riley Tang
"Lovely coffee shop with a great atmosphere, the latte and brownie were..."
Ellie H
"Had a trip down to Cardiff bay for a short break and was anxious I wouldnā€™t be able to get my usual morning coffee fix. After a quick google, we..."
Harry Steel
"A pleasant place with very tasty coffee and a relaxing atmosphere. Here you can also have a healthy and nutritious..."
Anna Pascal
"Been using Quantum for some time, mainly ordering coffee beans online and also been into the shop in Cardiff Bay. Really like their coffee, it is..."
Simon Chew
"One of the best flat white and ice latte Iā€™ve ever had! The coffee bean theyā€™re using is more on a nutty note, perfectly roasted. The cakes were..."
Ashley Chan
"Coffee was very good. Not a huge fan of the place itself but you gotta respect the coffee craft..."
alexis dechandon
"The best coffee I have had in Cardiff, I order V60 it was..."
Abdullah Alshammari
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