What is nitro cold brew?

Nitro cold brew is coffee extracted cold and then served under nitrogen pressure through a stout-style faucet. Nitrogen, which is poorly soluble in water, forms stable micro-bubbles that create a thick head and an ultra-creamy texture with no added sugar or milk. Born in the United States around 2013, it has become the signature bar drink of fourth wave coffee.

Nitro cold brew combines two techniques. First, cold brew itself: a cold extraction, typically 12 to 18 hours in water between 4 and 20 °C, with a coarse grind and a high coffee-to-water ratio (around 1:8 for a concentrate to dilute, 1:10 to 1:12 for ready-to-drink). At low temperature, bitter compounds and chlorogenic acid are extracted far less efficiently; the cup is smoother, chocolaty, low in acidity and often better tolerated by sensitive stomachs. Second, nitrogen charging: the concentrate is sealed in a pressurised keg with either pure N2 or beer gas (70 % N2 / 30 % CO2) and served through a stout faucet fitted with a restrictor disc, exactly as a Guinness is poured.

Nitrogen dissolves poorly in water, unlike CO2. When the tap is pulled, the pressure drops sharply and micro-bubbles cascade out of the liquid, forming the characteristic waterfall effect followed by a persistent foam. The cup in your hand feels almost creamy, yet no dairy has been added. Service temperature hovers around 4-6 °C, and caffeine stays high — typically 150 to 200 mg per 30 cl, sometimes more depending on the extraction ratio.

The drink was reportedly popularised in 2013 by Cuvée Coffee in Austin and Stumptown in Portland, which began canning pressurised cold brew. Starbucks added nitro cold brew to its American menu in 2016, accelerating mainstream adoption. In Europe, nitro remains more of a curiosity than a commodity: it appears in specialty coffee shops in Brussels, Ghent and Antwerp, and occasionally in cocktail bars that use it as a base for coffee cocktails. Around La Hulpe or Genval, it mostly shows up on summer menus, where its chocolaty-creamy profile pairs easily with Belgian pastries such as dark chocolate moelleux or a Brussels waffle.

Classic cold brew vs nitro cold brew