Cold brew grind size

Cold brew grind size on a Timemore Chestnut C2

For Cold brew on a Timemore Chestnut C2, start at 34 clicks. That is about 1100 µm, a coarse grind.

Timemore Chestnut C2 setting for Cold brew34 clicksCoarse grind, ~1100 µm

Finer 33 clicksCoarser 35 clicksStep size 33.8 µm

Adjusting from 34 clicks

When	Setting	Particle size
Finer: sour or thin cups	33 clicks	~1085 µm
Start here	34 clicks	~1100 µm
Coarser: bitter or dry cups	35 clicks	~1145 µm

Lower numbers are finer. To grind finer, turn the setting down. Change one step at a time, and brew again before changing anything else.

Starting recipe for Cold brew

Dose100 g
Water800 g
Ratio1:8
Time12 to 18 hours
Water temperaturecold water, in the fridge or at room temperature

Steps

Add 100 g of coarse coffee to a jar and pour in 800 g of cold water.
Stir so all the grounds are wet, cover, and leave for 12 to 18 hours.
Strain through a fine filter or paper.
This is a concentrate. Dilute to taste with water or milk, and keep it in the fridge.
Taste. Weak or sour: steep longer or grind slightly finer. Bitter or muddy: shorten the steep or grind coarser.

Other brew methods on a Timemore Chestnut C2

Cold brew on other grinders

Questions

What grind setting is best for Cold brew on a Timemore Chestnut C2?

Start at 34 clicks and adjust by taste. Lower numbers are finer. To grind finer, turn the setting down.

How do I know if I should grind finer or coarser?

Weak or sour: steep longer or grind a little finer. Bitter or muddy: shorten the steep or grind coarser.

Where does this setting come from?

The Timemore Chestnut C2 is mapped to particle size in microns, fitted from the Honest Coffee Guide's settings for this grinder. It is a starting point, not a guarantee.