Cold brew is already one of the most hands-off ways to make great coffee. But cold brew concentrate takes it a step further: one batch on Sunday gives you enough coffee for the entire week. Here's how it works and why it's worth knowing.
Concentrate vs Regular Cold Brew
Regular cold brew uses a 1:8 to 1:15 ratio of coffee to water and produces a drink ready cup you pour over ice. Cold brew concentrate uses a much stronger ratio. Typically 1:4 to 1:5, and produces a thick, intensely flavored liquid you dilute before drinking.
Why concentrate?
- Takes up less fridge space (you store a small jar, not a full pitcher)
- More versatile - dilute with water for iced coffee, with milk for an iced latte, or less for a stronger cup
- Stays fresh longer - up to two weeks refrigerated, vs. one week for diluted cold brew
- More efficient - one 30-minute prep session covers your whole week
The Recipe
Makes about 12–16 servings (1 cup concentrate)
- 1 cup (about 100g) coarsely ground coffee
- 2.5 cups (600ml) cold filtered water
Instructions:
- Add coffee grounds to a large jar or French press.
- Pour cold water over the grounds and stir until all the coffee is wet.
- Cover and refrigerate for 18–24 hours (longer steep = stronger concentrate)
- Strain through a fine mesh strainer lined with a paper filter or through a French press screen. Strain slowly; rushing produces cloudy concentrate.
- Store strained concentrate in an airtight jar in the fridge for up to two weeks.
How to Serve
Iced black coffee: 1 part concentrate + 1–2 parts water, over ice. Adjust ratio to taste.
Iced latte: 1 part concentrate + 1–2 parts milk (oat, almond, or whole), over ice.
Hot coffee: 1 part concentrate + 1 part hot water. Stir. Fast and excellent for mornings when you don't want to brew.
Coffee cocktail or smoothie base: Use undiluted concentrate as an intensely flavored coffee component.
The Best Coffee for Cold Brew Concentrate
Cold brewing naturally reduces acidity and highlights sweetness and body. Medium/dark and dark roasts work especially well because they produce a smooth, chocolatey concentrate without bitterness.
Light roast cold brew is worth trying too. It produces a surprisingly bright, clean concentrate that's quite different from what most people expect cold brew to taste like. Try both and compare.
Whatever you use, freshness matters. Stale coffee makes weak, flat cold brew concentrate even with a long steep. Starting with fresh roasted beans makes the difference you can actually taste.
Tips for Better Concentrate
- A coarse grind is essential. Fine grounds over extract even in cold water and produce bitterness. Use the same coarseness you'd use for French press.
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Filtered water improves flavor. Cold brew has nowhere to hide; water quality shows up directly.
- Don't rush the straining. Let gravity do the work through the paper filter. Squeezing or pressing the grounds produces murky, bitter concentrate.
- Label your jar with the brew date. Two weeks is the max; one week is the sweet spot.
Shop fresh-roasted coffee for cold brew → Full cold brew brewing guide →
