One Ounce for Onion

★ 4.7 · 85 reviews Bangkok Opened Opening date unknown

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A roaster café hiding behind an Ekkamai shop

Walk through a small clothing and lifestyle shop on Ekkamai Soi 12 and you land in one of Bangkok's best-kept coffee secrets. One Ounce for Onion roasts its own beans and draws a loyal crowd of people who actually track the city's independent coffee scene.

The space stays low-key, built for filter coffee and slow conversation rather than quick turnover. Regulars like to keep it that way.

What guests say

Reviews by Google

FizzyButhcer B 582 reviews · Local Guide 6 May 2026

Japanese style cafe with great French bakery.Quite enjoy 🥰
Daniel Yeung 359 reviews · Local Guide 9 October 2025

Cozy little coffee shop. Their piccolo is one of the best I have ever tasted. Parking can be challenging.
Kanyth B. 841 reviews · Local Guide 12 April 2025

The Crème Brûlée dough is a 2.5/5 for me. The dough is a bit too tight, and the burnt sugar is more bitter than I’ve had before. The coffee is okay, but I don’t like the smell of the place.
Ivan Mazalov 24 reviews · Local Guide 29 May 2024

I visited in early May 2024 The coffee is excellent, and the staff is friendly. I came with my laptop to work and found it quite comfortable. I forgot my cap, but the team kindly set it aside until my return—thank you 🙏 Special kudos for the Brassica—it's a new level of taste. Good luck!
Michiko Nina 33 reviews · Local Guide 6 March 2024

Loved the matcha fizz and the matcha kaya donut! It was a bit hard to find, it was in a narrow street but just walking distance from the main street, near Format/Koops and a couple of other restaurants if you're looking for food since this place only had donuts :)