Medium roast is already one of the best roasts you can brew cold. You rarely need to switch away from it.
Cold water pulls sweetness out of the bean slowly and gently. It also leaves behind much of the sharpness that hot water would carry into the cup.
If you want to blend, pair your medium roast with a medium-dark roast at about a 60 to 40 split. Go half and half with a light-medium roast for a brighter, black-friendly cold brew.
People ask this question two ways. Some ask whether medium roast itself is right for cold brew, while others ask which roast to add next to it.
The short version covers both: medium roast alone is the best all-around pick, with medium-dark as the top blend partner.
Why Medium Roast Works So Well in Cold Brew
Cold water extracts flavor slowly and selectively from coffee grounds. That single fact changes which roast level wins.
Roasting to medium develops chocolate, caramel, and nut notes through caramelization. Traces of the bean’s origin character still remain, so the cup stays interesting.
Lighter and medium roasts therefore taste smoother and cleaner in cold brew than they do in hot brewing. It is the opposite of what many people assume.
Very dark roasts flip that advantage. In a long cold steep they can taste smoky, woody, or simply flat.
The reason comes down to solubility. Darker roasts are more porous and give up their flavor faster, so long immersion pushes their roasty notes past the pleasant stage.
For hot filter coffee, the Specialty Coffee Association’s Golden Cup standard sets its classic extraction target at 18 to 22 percent. Cold brew sits outside that hot-water framework, but strength still depends on how much coffee dissolves over time, and medium roast simply asks for a little more patience.
The Best Roast Pairings for Medium-Roast Cold Brew
A 60/40 blend of medium and medium-dark roast is the best everyday pairing for cold brew. It keeps medium roast’s sweetness while adding body and dark chocolate depth.
The partner here is a Full City roast, which means medium-dark: a rich brown bean that stops just before oils show on the surface. Vienna and French refer to darker levels still, with oily, very dark beans.
Use the table below to choose a blend partner based on how you drink your cold brew.
| Choice | Starting Ratio (Medium to Partner) | Flavor You Get | Best Used For |
| Medium roast only | No blend needed | Caramel, cocoa, toasted nut, balanced sweetness | Everything, especially neat iced cups |
| Medium-dark (Full City) | 60 : 40 | Deeper dark chocolate and fuller body, sweetness intact | Everyday cold brew, black or with a splash of milk |
| Dark (Vienna or French) | 70 : 30 | Bold roasty edge with low perceived acidity | Milk-heavy drinks and lattes |
| Light-medium (City) | 50 : 50 | Bright stone fruit and berry over a honey-nut backbone | Black servings over ice |
Treat these splits as starting points and taste your way toward your favorite. Keep notes once a split stands out.
One honest distinction matters here. Blending changes the direction of your flavor, while brew ratio and steep time control strength.
A blend tweak cannot rescue a watery batch built on a thin ratio. Fix strength first, then sculpt flavor with the pairing.
Pick the Right Bean Process Before You Blend
Roast level and processing work together: natural processing brings big fruit, while washed processing brings clean sweetness.
Natural, or dry processed, beans dry inside the whole coffee fruit before hulling. Look to natural Ethiopian or Central American medium roasts for berry jam, stone fruit, and milk chocolate notes.
Washed, or wet processed, beans have the fruit stripped off before drying. Washed Colombian or Guatemalan mediums lean toward caramel, roasted almond, and a mellow apple-like acidity.
Both styles hold up over a long cold steep. The gentle extraction carries the fruit forward without sharpening it into sourness.
Brew Settings That Flatter Medium Roast
Grind extra coarse, like kosher salt, and give medium roast the longer end of the steep. Coarse particles resist over-extraction during long immersion, so flavor stays sweet instead of bitter.
The National Coffee Association recommends a coarse grind for cold brew for exactly that reason. A quality burr grinder makes it repeatable, and the Baratza Encore handles the job reliably.
- Burrs: 40 mm conical steel
- Settings: 40 stepped grind positions
- Hopper capacity: 8 oz of beans
- Grounds bin: 5 oz
Shop the Baratza Encore grinder on Amazon
You can improvise with a jar, but a dedicated brewer simplifies filtering. The Toddy Cold Brew System and the Hario Mizudashi bottle are two popular picks for full-batch immersion.
- Toddy: brewing container plus glass decanter
- Toddy: reusable felt filters included
- Hario: 1000 ml capacity with built-in mesh basket
- Hario: no paper filters required
Weigh your coffee and water for consistency, since scooped volume drifts with bean density. A simple gram scale costs little and removes the guesswork.
For concentrate, start near 1 part coffee to 4 or 5 parts water by weight, for example 200 g of coffee with 1000 g of water. For ready-to-drink strength straight from the fridge, aim closer to 1:8 or 1:10.
Use the table below to set up your next batch.
| Setting | Starting Point |
| Grind size | Extra coarse, like kosher salt |
| Concentrate ratio | 1:4 to 1:5 by weight (200 g coffee, 1000 g water) |
| Ready-to-drink ratio | 1:8 to 1:10 by weight |
| Room-temperature steep | 14 to 16 hours |
| Refrigerated steep | 20 to 24 hours |
Most published cold brew recipes fall somewhere inside a broad 12 to 24 hour window, so timing is forgiving. At room temperature, medium roast does well around 14 to 16 hours, and pushing past roughly 18 hours warm can invite flat, woody notes.
Refrigeration slows everything down. Plan on 20 to 24 chilled hours instead.
Starbucks slow-steeps its signature cold brew for about 20 hours before serving it. That timeline sits comfortably inside the ranges above, which shows how forgiving the method is.
Thin, sour, or hollow-tasting cold brew can indicate under-extraction. Before blaming the beans, confirm a coarse grind, a weighed ratio, and a room-temperature steep of at least 14 hours.
Smoky or harsh flavors can indicate a dark component doing too much work. Shift back toward the 70/30 medium-to-dark split, or chill your steep sooner.
The same medium roast behaves differently across hot methods, so see how it performs in drip coffee before you buy more beans.
For latte-style milk drinks pulled hot, medium-roast espresso shots follow their own rulebook. And when an overnight batch feels too far away, there is a five-minute AeroPress shortcut.
For most people, plain medium roast already makes the best cold brew in the house. Blend roughly 60/40 with a Full City roast when you want more depth.
Set your grinder to extra coarse tonight, weigh 200 g of coffee against 1000 g of water, and taste tomorrow’s batch before changing a thing.