How Should I Grind Medium-Roast Coffee For Cold Brew?

For cold brew, grind medium-roast coffee coarse, about the texture of kosher salt or turbinado sugar.

Grinding fine seems logical for a strong cup, but hours of cold water turn those extra-fine particles into bitterness and mud.

Coarse grounds give cold water slow, gentle contact across a steep of 12 to 24 hours, which lets medium roast keep its clean, sweet side.

The sections below cover the target texture, the grinder setting, and the taste fixes, plus the reason coarse wins on physics.

The Right Grind Size for Medium-Roast Cold Brew

Start medium-roast cold brew at a coarse grind, with chunky, irregular crumbs that look like kosher salt, coarse sea salt, or turbinado sugar.

Rub a pinch of grounds between your fingers. You should feel rough grains, not powder, dust, or anything as soft as table salt.

Cold brew guides give two answers, “coarse” and “medium-coarse,” and both have a place. Start at coarse, then let taste move the dial.

Coarse means the kosher-salt end of the spectrum, the safest start, and it tends to brew the cleanest cup.

Medium-coarse sits slightly finer, close to rough sand. It draws a touch more strength when batches come out thin.

Medium roast already brings balanced acidity and body to the glass, so grinding much finer tends to backfire. Too fine can turn the batch muddy or bitter, and too coarse can leave it thin and under-extracted (too little flavor pulled out).

James Hoffmann makes a related point in The World Atlas of Coffee. Medium roasts pair well with a coarse grind, thorough filtration, and either a slightly longer steep or a tighter ratio than a dark roast needs.

With the target set, the next job is hitting it on real equipment.

Hitting That Setting on Your Grinder

A burr grinder is the reliable way to a repeatable coarse setting. Two ridged metal discs (conical or flat) crush the beans evenly to the size you set, which keeps fines (coffee dust) low.

Blade grinders chop at random, so a batch mixes big chunks with powder.

As a starting practice, set the dial near its coarsest end, a few marks shy of maximum. Hand grinders work the same way: run the adjustment close to its widest setting and count the stops.

Check the grounds against the salt test by eye, then write the setting down so the batch repeats.

The Baratza Encore burr grinder is one example of this style: an electric conical burr grinder with a numbered dial for repeatable settings.

Key Specifications (Baratza Encore):

• Grind settings: 40, numbered
• Burr type: conical steel
• Power: electric, plug-in countertop use

No burr grinder yet? A blade grinder can still make cold brew: pulse in short bursts, shake between rounds, and expect a slower, cloudier strain.

Dial in the coarse setting, brew one test batch, and let taste handle the fine tuning.

Tuning the Grind by Taste

Taste a chilled sample of the finished brew before touching the dial. Every common cold brew flaw often points to one grind move.

A bitter, harsh, or muddy batch that dries your tongue (astringency) can indicate a grind that is too fine. The same batch often strains slowly and looks cloudy.

A thin, sour, or watery batch can indicate a grind that is too coarse. Shifting slightly finer, toward rough sand, pulls more strength from the same beans.

Use the table below to pick your next adjustment from the taste of your last batch.

Taste of the Last Batch	Grind Fix (Try First)	Also Try
Bitter, harsh, drying, or astringent	Grind slightly coarser, toward kosher salt	Shorten the next steep by a few hours
Thin, sour, or watery	Grind slightly finer, toward rough sand	Extend the steep a few hours, especially for fridge batches
Muddy, cloudy, or slow to strain	Grind coarser and sift out the dust	Strain through mesh first, then paper or cloth
Clean, sweet, and balanced	Keep the setting locked	Record the setting, ratio, and steep time

Grind, ratio, and steep time trade off, and each one can add strength to the cup. Change only one at a time so the cause and effect stay readable.

For reference, a standard cold brew steep runs 12 to 24 hours on a coarse grind. Concentrate recipes start near 1 part coffee to 4 or 5 parts water, roughly 200 grams of coffee per liter.

Ready-to-drink recipes sit closer to 1:8 to 1:10. Weigh everything on a digital kitchen scale, and serve the concentrate thinned about half-and-half with water or milk.

Fines, the tiny dust-like particles mixed into any grind, are what muddy cold brew. Sift the grounds through a fine-mesh sieve before steeping to remove a good share of them.

For a clear glass, strain twice: mesh or cloth first, then cold brew paper filters or a clean cloth second. James Hoffmann’s guidance in The World Atlas of Coffee pairs thorough filtration with coarse grounds, protecting sweetness without dragging in bitter compounds.

Grind does most of the quality work, but it cannot rescue stale beans. Check the right freshness window for medium-roast beans before the next bag hits the grinder.

With the batch fixed, here is why coarse wins on physics rather than preference.

Why Cold Brew Rewards a Coarse Grind

Cold water dissolves flavor far more slowly than heat does, so cold brew borrows time instead of temperature. Grind size and steep time work together to keep that slow pull clean.

According to the Specialty Coffee Association, cold immersion brewing needs coarse particle distributions to keep extraction rates balanced across long steeps. High concentrations of micro-fines (ultra-fine dust) instead cause over-extraction and astringency.

Hot brewing rinses past the grounds in minutes, so fines barely get time to do real damage there.

Cold brew gives those fines up to a full day of water contact. That slow, compounding contact is the reason a too-fine batch slides toward muddy and harsh.

This balance decides how medium roast reads in the glass. Brightness, sweetness, and body stay distinct when fines stay out of the cup, so coarse grinding protects exactly the flavors you paid for.

On most burr grinders, cold brew sits near the top of the entire range. Other methods want their own settings for the same beans.

See grinding medium roast for drip brewers or dialing in a medium-roast espresso grind to switch without guessing.

Grind medium-roast coffee for cold brew coarse, like kosher salt or turbinado sugar, with the burr dial set high.

A thin or sour batch calls for a small shift finer, toward rough sand. Brew one test batch at 1:5 for 12 to 24 hours, taste it, and write down the setting that earned its place.