Electric grinder

Cold brew grind setting for the Eureka Mignon Specialita

2.6–3

That is where to start with a light roast. It should come out looking like coarse sea salt. Medium roasts go to 2.8–3.2 and dark roasts to 3–3.4.

Eureka Mignon Specialita, set for a light roast

The setting, by roast

Lighter roasts are harder to pull flavor out of, so they grind a little finer and steep longer. Darker roasts go the other way. The dial runs from 0 to 4.

RoastSettingLooks likeSteep in the fridge
Light roast2.6–3coarse sea salt18–22 h
Medium roast2.8–3.2coarse kosher salt14–18 h
Dark roast3–3.4raw sugar10–14 h

Where the number comes from

People who own one report 2.1–4. Our starting point is 3 for a medium roast, and it moves with the roast.

Owner reports: reddit.com, reddit.com, honestcoffeeguide.com

If you changed the burrs

Different burrs cut differently at the same number. Here is where each set starts.

Burr setLightMediumDark
55mm flat steel, espresso profile (MAC55ITAv1802 'CP', stock)2.6–32.8–3.23–3.4
55mm flat steel, Brew/Filter profile (MAC55ITA-SF)OEM Eureka burr sold for the Mignon Brew Pro/Filtro but also listed as fitting the Specialita -- optimized for coarser filter/immersion grinding with fewer fines. Eureka doesn't publish a numeric offset vs the stock CP burr, so no dial shift is modeled.2.6–32.8–3.23–3.4

How to use it

  1. Set it. Set the dial to 2.6–3. That is the light roast setting. Use the table above for anything darker.
  2. Grind and look. You want pieces about the size of coarse sea salt.
  3. Steep. Give it 18–22 hours in the fridge, or 12–14 on the counter.
  4. Taste and adjust. Too bitter? Go coarser next time. Too sour? Go finer. Move about 0.4 at a time.

Let the app keep track.

Cold Brew Studio shows the dial created for your Eureka Mignon Specialita with the setting marked, sizes the batch to your brewer, and moves the dial for you when you rate how it tasted.

Free on iPhone and the web. No account needed.

Quick answers

What grind setting should I use for cold brew on the Eureka Mignon Specialita?
Start at 2.6–3 for a light roast, 2.8–3.2 for a medium roast and 3–3.4 for a dark roast.
How long should I steep cold brew ground on the Eureka Mignon Specialita?
18–22 hours in the fridge for a light roast, 14–18 for medium and 10–14 for dark. On the counter it goes faster: 12–14, 9–12 and 7–9 hours.
What should the grounds look like?
Coarse. About the size of coarse sea salt for a light roast, coarse kosher salt for medium and raw sugar for dark.