Brew guide

How to make cold brew coffee

Cold brew is surprisingly easy. Steep coarse coffee in cold water overnight and you get a smooth, low-acid concentrate that keeps in the fridge for up to two weeks.

Two glasses of dark coffee on a wooden tray

The recipe

Coffee
200g
Water
1 litre
Ratio
1:5
Grind
Coarse
Water temp
Cold or room temp
Time
12 hours or more

This makes a concentrate. Dilute it to taste when you serve it.

You will need

  • 200g of coarsely ground coffee
  • 1 litre of cold water, filtered if you can
  • Two containers with lids, like large jars
  • Coffee filter papers or a muslin cloth
  • A funnel (optional, but it helps)

Step by step

  1. Mix

    Put the coffee and water in one container and stir. Fill it as close to the top as you can and put the lid on, to limit oxidation. A large jar works well, or a cafetière with the top covered.

  2. Steep 12 hours+

    Leave it to steep for at least 12 hours at room temperature. You can steep it in the fridge instead, but allow 15 to 17 hours.

  3. Strain

    Strain it through a coffee filter or muslin into your second container, to catch all the grounds. Sealed and kept in the fridge, it will last one to two weeks.

  4. Serve it your way

    • Straight up: over ice, if you like it strong.
    • Iced latte: with ice and a splash of milk.
    • Long: topped up with water, americano-style.
    • Cold brew soda: with soda water, ice and a little syrup.

Getting the strength right

  • Too strong? Add more water or milk when you serve it, or use less coffee next time.
  • Too weak? Use more coffee, or let it steep for longer.
  • The two things that set the strength are the coffee-to-water ratio and how long it steeps.