Nitro cold brew is cold brew coffee infused with nitrogen gas, producing a cascading, creamy texture and thick head similar to a stout beer. The nitrogen creates micro-bubbles that give the coffee a velvety mouthfeel and natural sweetness without any added dairy or sugar. Making it at home requires a small investment in a keg system, but the results rival any specialty cafe.
Any vessel for steeping coarse ground coffee in cold water for 12-18 hours. A dedicated cold brew maker with a built-in filter simplifies straining. A large mason jar with cheesecloth works equally well.
A 2-litre stainless steel mini keg with a stout faucet (also called a nitro tap). The stout faucet has a restrictor plate that forces the coffee through tiny holes, creating the signature cascading micro-bubbles. Without a stout tap, the nitrogen effect is minimal.
Pure nitrogen gas chargers (N2), not CO2 or N2O. Each 2g N2 charger pressurizes approximately 1-2 litres of cold brew. You may need 2 chargers per keg fill for adequate pressure. Nitrogen is insoluble in liquid, which creates the small, stable bubbles unique to nitro coffee.
A clear pint glass (475ml) to showcase the dramatic cascading effect as the nitrogen settles. Pour and watch the cascade before drinking. Serve without ice, as the cold brew should already be chilled and ice dilutes the creamy texture.
Combine 100g of coarsely ground coffee with 600ml of cold, filtered water in your cold brew maker or jar. Stir gently to ensure all grounds are saturated. Cover and refrigerate for 14-18 hours. Longer steeping produces a stronger concentrate. Do not use hot water at any stage.
Strain the cold brew through a fine mesh filter, cheesecloth, or the built-in filter of your cold brew maker. Filter twice if sediment remains. Dilute the concentrate with cold water at a 1:1 ratio for standard strength, or use less water for a more intense nitro. The final liquid should be smooth and sediment-free.
Pour the diluted cold brew into your clean, chilled mini keg. Leave about 2cm of headspace at the top. Seal the keg lid tightly. The cold brew must be cold, ideally 2-4 degrees Celsius. Warm coffee does not absorb nitrogen effectively and produces flat results.
Attach the nitrogen charger to the keg and release the gas. Shake the keg vigorously for 30 seconds to distribute the nitrogen throughout the liquid. Release any excess pressure, then charge with a second N2 cartridge and shake again. The coffee should now be pressurized and ready.
Place the charged keg in the refrigerator for at least 1-2 hours before serving. This allows the nitrogen to fully integrate with the cold brew and ensures the cascade effect is at its most dramatic. The colder the coffee, the better the nitrogen behaves.
Open the stout tap and pour slowly into a tilted pint glass, straightening the glass as it fills, just like pouring a Guinness. The coffee should cascade with millions of tiny nitrogen bubbles settling downward, then forming a thick, creamy tan head on top. Serve without ice, milk, or sweetener.
The cold brew pours flat with no visible cascading bubbles and no creamy head.
The nitro pour looks correct but the coffee itself tastes dull, lifeless, and one-dimensional.
The cold brew tastes carbonated and fizzy rather than smooth and creamy.
