Slow drip
Cold Bruer Slow Drip System: cold brew ratio and recipe
60g coffee570mL water
That is an everyday batch at 1:9.5, dripped over 3–8 hours and poured straight over ice. Holds 710 mL of water and takes up to 60 g of coffee.
The maker’s own recipe
1:11.860 g coffee708 mL waterdrips for 3–8 h
This is the recipe Bruer publishes for this brewer, and it is what Cold Brew Studio opens with when you pick it. It makes about 2½ cups, best straight over ice.
How the maker does it
Bruer's official brewing guide: measure 2/3 cup (60g) of medium-ground coffee (a 'pour-over grind,' fresh-roasted, medium roast recommended) into the brewing chamber and level it, then place a round AeroPress-style paper filter on top for even dispersion. Pre-wet the grounds with about 2 fl oz of water. Insert and seal the silicone valve/plug. Measure out 24 fl oz (~710ml) of an ice-and-water mixture (about half ice, half water) and pour it into the top chamber. Open the valve and set the drip rate — Bruer recommends about one drip per second, which falls in the 'target range.' Let it drip until all liquid has passed into the decanter below. Total extraction time is typically 3-8 hours depending on drip rate/taste (a reseller's guide using the same 60g/24oz recipe at ~1 drop/sec times it at roughly 4 hours for a lighter, smoother cup; slower rates over 5-6+ hours give a richer, fuller-bodied result).
Source: bruer.co
The recipe, by strength
Each one fills this brewer as far as it honestly goes. Numbers are for a light roast.
| Strength | Ratio | Coffee | Water | Drip time | Makes | Drink it |
|---|---|---|---|---|---|---|
| Everyday | 1:9.5 | 60 g | 570 mL | 3–8 h | about 2 cups | straight over ice |
| Strong | 1:7.5 | 60 g | 450 mL | 3–8 h | about 1½ cups | with a splash of milk |
| Jet fuel | 1:5.3 | 60 g | 318 mL | 3–8 h | about 1¼ cups | cut with a little water or milk |
| Concentrate | 1:4.5 | 60 g | 270 mL | 3–8 h | about 1¼ cups | mixed 1:1 with water or milk |
If your beans are darker
Darker roasts give up their flavor faster, so they brew at a slightly wider ratio. The drip time stays the same.
| Roast | Ratio | Coffee | Water | Drip time |
|---|---|---|---|---|
| Light | 1:9.5 | 60 g | 570 mL | 3–8 h |
| Medium | 1:10 | 60 g | 600 mL | 3–8 h |
| Dark | 1:10.5 | 60 g | 630 mL | 3–8 h |
Everyday strength shown.
How it goes
- Grounds in the chamber.
- Ice water in the top.
- Set the drip.
- Leave it be.
Grind finer than you would for a steeped cold brew, closer to a pour-over grind. See your grinder’s cold brew setting, then go finer from there.
Good to know
True slow-drip, not immersion: water/ice drips continuously through the coffee bed over hours rather than sitting in a steep, so there is no fixed 'steep time' to set — the user dials a drip rate (target about 1 drop/sec) with a valve and total brew time (3-8h) falls out of that rate. It uses a round paper filter (AeroPress-style) for a clean, low-sediment result, and a medium/pour-over grind — noticeably finer than the coarse grind used for jar/immersion cold brew, since a too-coarse grind drips through too fast with under-extraction and too-fine chokes the valve.
This brewer takes about 60 g of coffee at most. Stronger recipes can’t add more grounds, so they use less water instead. That is why every strength comes in under the full 710 mL.
Let the app keep track.
Cold Brew Studio sizes every batch to your Cold Bruer Slow Drip System, tells you when it is ready, and adjusts the recipe when you rate how it tasted.
Free on iPhone and the web. No account needed.
Quick answers
- How much coffee do I use in the Cold Bruer Slow Drip System?
- For an everyday strength, 60 g of coffee to 570 mL of water, a 1:9.5 ratio. For a concentrate, 60 g to 270 mL.
- How long does the Cold Bruer Slow Drip System take?
- 3–8 hours, depending on the drip rate you set. It drips through once, so there is no steep to time.
- What ratio does the maker recommend for the Cold Bruer Slow Drip System?
- 1:11.8, which is 60 g of coffee to 708 mL of water, dripped over 3–8 hours.