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Roast Coffee Co.Roast Coffee Co.

Specialty coffee roasted daily in-house at our Medford, NJ cafe. Serving the community since 2014.

200 Tuckerton Rd

Medford, NJ 08055

(856) 762-0044

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Fresh Roasted · Coarse Ground Available · Ships Nationwide

The Best Coffee Beans for Cold Brew

Cold brew is only as good as the beans you start with. We carry fresh-roasted coffees specifically suited for cold-brew extraction — low acidity, chocolate and nutty profiles, and heavy enough body to shine when steeped cold for 18+ hours.

Shop Cold Brew BeansBrewing Guide

What Makes a Great Cold Brew Bean?

Bean selection changes the character of your cold brew more than any other variable.

Cold water extracts coffee differently than hot water. Without heat to dissolve soluble compounds quickly, the extraction happens slowly over 12–24 hours — and certain flavor compounds come out in different proportions. The result is coffee that's naturally sweet and low-acid, with a heavier, smoother body.

Roast level matters most. Medium to dark roasts are best for cold brew because cold water is better at extracting the sugars and oils that develop during roasting than at extracting the bright acids found in light roasts. A medium roast like our Colombia Supremo produces a clean, sweet, caramel-forward cold brew. A dark roast like Sumatra Mandheling produces a more intense, chocolatey concentrate. Light roasts can taste sour or thin when cold-steeped.

Origin characteristics matter too. Coffees with chocolate, nutty, or caramel tasting notes translate well to cold brew. High-acidity coffees from Kenya or Ethiopia can work — but they require shorter steep times and careful calibration. For most people making cold brew at home, start with a medium-dark Colombian or Sumatra.

Grind coarse. Cold brew is a long extraction by design. A coarse grind slows extraction and prevents over-extraction (bitterness). If you've ever made cold brew that tasted harsh or bitter, a finer grind or too-long steep time is usually the cause. We offer pre-ground at coarse grind when you order — just select it at checkout.

Our Top Cold Brew Picks

Fresh roasted, consistently available, and proven performers for cold-steep extraction.

Sumatra Mandheling

Dark Roast

Dark chocolate, earthy, full body, low acidity

Sumatra's heavy body and low acidity make it one of the most popular cold brew bases. The earthy, chocolatey character concentrates beautifully over a long steep.

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Colombia Supremo

Medium Roast

Milk chocolate, caramel, nutty, smooth finish

Colombian medium roast is incredibly versatile. The caramel and nut notes come through clean in cold brew, making it approachable for first-timers.

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Guatemala

Medium-Dark Roast

Brown sugar, dark chocolate, light citrus

Guatemalan coffees have enough structure to hold up through long cold-brew steeping while developing a rich sweetness that makes a great black cold brew.

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Our House Blend

Medium Roast

Balanced, versatile, crowd-pleasing

A well-crafted blend is forgiving for cold brew — the balance across origins smooths out any extremes, making a consistent cold brew every time.

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Cold Brew Brewing Guide

Make a clean, smooth cold brew concentrate at home — no special equipment required.

Ratio

Start with a 1:4 ratio — 1 part coffee to 4 parts water (by weight). This makes a concentrate you dilute 1:1 with water or milk before drinking. For a ready-to-drink cold brew without dilution, use 1:8.

Grind

Grind as coarse as possible — coarser than French press. This is the single most important variable. Too fine = over-extracted bitterness. Order pre-ground at coarse grind from our shop if you don't have a burr grinder.

Steep Time

Steep in the fridge for 16–24 hours. Lighter roasts do better at 12–16 hours; darker roasts can go the full 24. Steeping at room temperature is faster (8–12 hours) but produces more acidity.

Equipment

You don't need a Toddy system. A large mason jar and a fine-mesh strainer or cheesecloth work perfectly. French press is another excellent option — steep in the press, then plunge slowly and transfer to a sealed bottle.

Straining

Strain slowly. Two passes through cheesecloth or a paper filter will produce a crystal-clear concentrate. Avoid pressing the grounds — that pushes fine sediment through and clouds the result.

Storage

Store concentrate in a sealed container in the fridge for up to 14 days. Make a big batch on the weekend and you have cold brew all week.

Full Cold Brew Brewing Guide →

Cold Brew FAQ

What roast is best for cold brew?

Medium to dark roasts work best for cold brew. Lighter roasts can taste sour or astringent when cold-steeped because cold water extracts acids more aggressively than heat. A medium-dark roast gives you chocolate, caramel, and nutty notes that cold water extracts cleanly. That said, some light roasts with big fruity character can produce excellent cold brew — it's worth experimenting once you have the basics down.

How coarse should I grind for cold brew?

Grind as coarse as possible — think coarse sea salt or slightly coarser than French press. Cold brew steeps for 12–24 hours, so finer grinds lead to over-extraction and bitterness. A burr grinder at its coarsest setting is ideal. If you're using a blade grinder, pulse briefly to keep the grind uneven and coarse.

How long does cold brew last in the fridge?

Cold brew concentrate lasts 10–14 days in the fridge in an airtight container. Ready-to-drink cold brew (already diluted) is best within 5–7 days. The long shelf life is one of cold brew's biggest advantages — make a large batch on Sunday and you have coffee all week.

Can I use light roast for cold brew?

Yes, but with some caveats. Light roasts are higher in acidity, which cold water can extract as sourness rather than brightness. If you want to try it, use a slightly shorter steep time (10–14 hours instead of 18–24) and a higher coffee-to-water ratio to compensate for less body. Ethiopian light roasts with big berry notes can be exceptional as cold brew — very different from the standard chocolate profile, but worth exploring.

Related

Cold Brew in South Jersey·How to Make Cold Brew·Best Coffee for Cold Brew Guide·Fresh Roasted Coffee Beans

Get Pre-Ground for Cold Brew

Order any of our beans pre-ground at coarse grind — perfect for cold brew, ready to steep when your order arrives. Shipped within 24 hours of roasting.

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