Coffee Beans for Iced Coffee

Which roast is best for cold brew — light or dark?

There's no single "best coffee beans for cold brew" answer — it depends on what you're drinking. A darker roast holds its own against milk, cream and sauce-heavy iced drinks, because the bolder, more roasted flavour doesn't get lost. A lighter roast comes through cleaner in a straight cold brew concentrate, where there's nothing else in the glass to compete with.

Black Gold (medium-dark roast) is the one to reach for if your iced coffee usually comes with oat milk, cream, or a flavoured syrup. The roast level gives it enough body to cut through, so you still taste coffee under the milk.

White Gold (medium-light roast) is built for cold brewing on its own — iced lattes, cold brew concentrate, or just cold brew over ice. The lighter roast keeps its brown sugar and apple notes through a long, slow cold extraction, rather than tasting flat or one-note the way a dark roast can when it's not balanced out by milk.

As a rule: the more milk, cream or sauce in the drink, the darker the roast can go. The closer to black your cold brew coffee is served, the lighter the roast should be.

How to cold brew at home

Start with coarsely ground coffee beans — a grind closer to sea salt than table salt. Too fine, and the long steep time over-extracts the coffee grounds, leaving a bitter, muddy cold brew rather than a smooth one.

1. Combine coarsely ground coffee with cold, filtered water (roughly 1:8 for a drinking-strength brew, or 1:4 if you want a cold brew concentrate to dilute later).
2. Stir to make sure all the grounds are wet, then leave in the fridge for 12–18 hours.
3. Strain through a coffee filter, fine sieve or cafetière plunger to separate the liquid from the grounds.
4. Serve over ice, with milk, or dilute the concentrate to taste.

This is the whole cold brewing process — no machine required, just time and a coarse grind.

Cold brew vs iced coffee (they're not the same thing)

Iced coffee is regular hot brewed coffee — drip coffee or espresso — cooled down and poured over ice. Cold brew never touches hot water at all. That difference in brewing method changes the result: cold brewed coffee is naturally sweeter and lower in acidity than hot coffee served cold, because cold water pulls sugars and body out of the bean without dragging the sharper, more acidic notes along with it. If your cold brew coffee has ever tasted bitter, it's usually the grind (too fine) or pre ground coffee that's gone stale, not the brewing process itself.

Frequently Asked Questions

Can I use any coffee bean for cold brew?

Most beans will work, but roast level changes the result more than with hot coffee. Regular coffee beans in a light roast can taste thin once diluted; a medium roast or medium-dark roast generally gives a fuller cold brew.

What's the difference between cold brew and cold brew concentrate?

Cold brew concentrate is brewed with less water, so it's stronger — designed to be diluted with water or milk before drinking. A regular cold brew coffee is ready to drink over ice as it is.

Can I cold brew decaf coffee beans?

Yes — here's how to make decaf cold brew, including how much caffeine (if any) ends up in the glass.

Whole bean or ground for cold brew?

Whole bean, ground fresh and coarse, gives the best flavour — pre ground coffee loses aroma fast once the bag's opened, and a fine grind (like a standard bag of ground beans) will over-extract during a long cold steep.