Cold Brew Coffee – A Summer Kitchen Essential

 Hot coffee brewed cold is one of those ideas that sounds faintly gimmicky until you try it, at which point it becomes simply the way you make coffee in warm weather. Cold brew is not iced coffee, it is coffee steeped in cold water for an extended period, producing a concentrate that is smoother, less acidic and more intensely flavoured than anything achievable through heat. 

The science is straightforward. Heat extracts compounds from coffee grounds quickly but indiscriminately, pulling out bitter, acidic molecules alongside the desirable aromatic ones. Cold water, given enough time, extracts more selectively. The result is a coffee with a rounded, almost chocolatey sweetness and none of the sharpness that sends some people reaching for oat milk in self-defence. 

To make it, you need coarsely ground cofee, roughly the texture of demerara sugar. Too fine and the brew will be bitter and difficult to filter; too coarse and it will be weak and flavourless. A medium-dark roast works particularly well. Combine 100g of ground coffee with one liter of cold, filtered water in a large jar or jug, and leave in the fridge for twelve to sixteen hours. Longer than sixteen hours risks bitterness, shorter than twelve risks under-extractions. 

Strain the mixture through a fine mesh sieve lined with a piece of muslin or a large coffee filter paper. This takes patience – do not press or squeeze the grounds, as this forces sediment through and muddies the concentrate. The resulting liquid should be dark, glossy, and almost syrup-like in appearance. 

To serve, dilute the concentrate with cold water, milk or oat milk at roughly 1-1 ratio, though this is entirely to taste. Pour over ice, add a dash of vanilla extract or simply drink it black over a single large ice cube if you want to feel briefly sophisticated hahaha. Here you have your cold brew coffee