Aug 31 2026

Cold Brew Tonic Recipe

Time16m
Serves1

16 oz

Was this page helpful?

Help improve this recipe for others.

Send this recipe to your inbox.

We'll email it straight to you - plus weekly cooking inspiration.

Ingredients

Some product links may be affiliates. If you buy through them, you're supporting the site and Pekin may earn a commission at no extra cost to you.

Cold Brew Concentrate

Method

Cold Brew Concentrate

  1. 1

    Combine and steep

    In a clean jar or pitcher, add 0.75 cups coarsely ground coffee. Pour 3.5 cups cold filtered water over the grounds, ensuring all grounds are saturated. Stir gently to make sure no dry pockets remain.

  2. 2

    Steep time

    Cover the jar and let steep at room temperature or in the refrigerator for 16 to 20 hours. Longer steep (up to 20 hours) yields fuller extraction; shorter (16 hours) is slightly brighter.

  3. 3

    Strain

    After steeping, strain the mixture through a fine-mesh sieve lined with cheesecloth, a coffee filter, or a dedicated cold brew filter into a pitcher. If necessary, strain a second time to remove sediment. You should have about 3 to 4 cups of cold brew concentrate (strong).

  4. 4

    Dilute (optional)

    If your concentrate is very strong, you may dilute with a little cold filtered water to reach a coffee portion of about 4 fl oz for this recipe. For this 16 oz drink use 4 fl oz concentrate as listed.

Assembly

  1. 5

    Chill a 16 oz glass in the fridge briefly or fill it with a few ice cubes to cool. Discard initial ice if you used it only for chilling.

  2. 6

    Add 1 cup of ice to the glass (about 1 cup). Pour 8 fl oz chilled tonic water into the glass over the ice.

  3. 7

    Gently pour 4 fl oz cold brew concentrate over the tonic so it floats and creates a layered appearance. If you prefer sweeter, add 1/2 tablespoon simple syrup before pouring the concentrate and stir gently.

  4. 8

    Garnish with a lemon or orange twist: express the citrus oils over the drink by twisting the peel, then run it around the rim and drop it in.

  5. 9

    Serve immediately with a straw or stirring spoon so the drink can be mixed to taste.

More from TOUS les JOURS Bakery Café - Ann Arbor