Ingredients:

  • 250 g Freshly Roasted Coffee Beans (coarsely ground)
  • 1 Litre Filtered Cold Water

Instructions:

  1. Grind the Beans: Weigh out the coffee beans. If not pre-ground, grind them to a very coarse consistency (the texture of breadcrumbs or coarse sea salt). Avoid a fine grind, which leads to sludge and bitterness.
  2. Combine Ingredients: Add the coarse coffee grounds to your large container or pitcher. Gently pour the measured, filtered water over the grounds.
  3. Ensure Saturation: Use a long spoon or spatula to gently stir the mixture until all the grounds are fully saturated ('bloomed'). Do not over-mix, as this can encourage bitterness.
  4. Steep: Cover the container tightly and place it in the refrigerator. Allow it to steep undisturbed for 12 to 18 hours (16 hours is often the sweet spot for balance).
  5. First Strain (Rough Filter): Place a fine-mesh sieve over a large, clean bowl or second pitcher. Slowly pour the coffee mixture through the sieve. Discard the spent grounds.
  6. Second Strain (Fine Filter): Set up a second filter for a cleaner finish. Line your sieve with a double layer of cheesecloth, or place a paper filter inside a funnel resting over your final storage container.
  7. Filter Slowly: Pour the roughly strained liquid through the finer filter. This process may take 10–15 minutes. Do not press down on the grounds or the filter.
  8. Store the Concentrate: Transfer the finished, clear concentrate into an airtight container or pitcher. Seal and label with the date. Store in the refrigerator.
  9. Dilute and Serve: Fill a glass with ice. Add 1 part cold brew concentrate (e.g., 120 ml). Add 1 to 2 parts of your chosen dilution liquid (water, milk, etc.). Stir well and adjust concentration or sweetener to taste.