Cold brew coffee has become one of the most popular specialty coffee brewing methods in Europe and worldwide. Known for its smooth texture, refreshing taste, and naturally low acidity, cold brew is the perfect coffee drink for warm days, busy mornings, and home baristas looking for an easy brewing method.

At ROS Specialty Coffee, we believe great cold brew starts with high-quality specialty coffee beans, the right grind size, and patience. In this guide, you’ll learn how to make cold brew coffee at home, discover the best coffee-to-water ratios, and explore expert tips for brewing café-quality cold brew.

What Is Cold Brew Coffee?

Cold brew coffee is made by steeping coarse ground coffee in cold water for an extended period of time, usually between 12 and 18 hours. Unlike iced coffee, which is brewed hot and cooled down, cold brew is extracted slowly using cold water.

This brewing process creates:

• Lower acidity

• Smooth flavor

• Natural sweetness

• Rich body

• Less bitterness

Cold brew is perfect for specialty coffee because it highlights chocolate, caramel, fruity, and nutty flavor notes in a unique way.

Cold Brew Coffee Recipe

Classic Cold Brew Concentrate Recipe

Ingredients

• 100g coarse ground specialty coffee

• 500ml cold filtered water

Brewing Time

• 12–18 hours

Grind Size

• Coarse

How to Make Cold Brew Coffee at Home

Step 1: Grind Your Coffee

Use freshly roasted specialty coffee beans and grind them coarse. The texture should resemble sea salt or raw sugar.

A coarse grind helps prevent over-extraction and creates a cleaner cup.

Step 2: Mix Coffee and Water

Add your ground coffee to a jar, French press, or cold brew maker. Pour cold filtered water slowly over the coffee grounds and stir gently to ensure all coffee is saturated.

Recommended ratio:

• 1:5 for cold brew concentrate

• 1:8 for ready-to-drink cold brew

Step 3: Steep Slowly

Cover the container and place it in the fridge or a cool area for 12 to 18 hours.

Longer brew times create a stronger and richer cold brew flavor.

Step 4: Filter the Coffee

Strain the coffee through a paper filter, fine mesh filter, or cloth filter to remove grounds.

Your cold brew concentrate is now ready.

How to Serve Cold Brew

Cold brew can be enjoyed in several ways:

Classic Cold Brew

Serve over ice with water.

Cold Brew with Milk

Add milk or oat milk for a creamy texture.

Sweet Cold Brew

Add vanilla syrup, caramel, or brown sugar.

Sparkling Cold Brew

Mix cold brew with sparkling water for a refreshing coffee drink.

Best Coffee Beans for Cold Brew

Specialty coffee works exceptionally well for cold brew because of its clean flavor profile and balanced sweetness.

For the best results, choose coffees with:

• Chocolate notes

• Caramel sweetness

• Nutty flavors

• Fruity acidity

• Medium roast profiles

At ROS Specialty Coffee, we recommend experimenting with different origins to discover your ideal cold brew taste.

Common Cold Brew Mistakes

Using Fine Grind Coffee

Fine coffee grounds can make cold brew bitter and muddy.

Brewing Too Short

Cold brew needs time for proper extraction.

Using Low-Quality Coffee

Since cold brew is simple, coffee quality makes a huge difference.

Wrong Coffee-to-Water Ratio

Too much water creates weak cold brew. Too little creates overpowering concentrate.

Cold Brew vs Iced Coffee

Many coffee lovers confuse cold brew with iced coffee.

Cold Brew

• Brewed cold

• Smooth and low acidity

• Long extraction time

Iced Coffee

• Brewed hot

• More acidity

• Faster preparation

Both are delicious, but cold brew offers a softer and naturally sweeter flavor profile.

Why Specialty Coffee Lovers Love Cold Brew

Cold brew has become a major trend in specialty coffee culture because it’s:

• Easy to prepare

• Refreshing

• Highly versatile

• Great for summer

• Perfect for home brewing

Whether you enjoy pour over coffee, espresso, or French press, cold brew is an essential brewing method to explore.

Final Thoughts

Making cold brew coffee at home is simple, affordable, and rewarding. With the right specialty coffee beans, coarse grind size, and patience, you can create café-quality cold brew from your own kitchen.

At ROS Specialty Coffee, we believe every brewing method reveals a different side of coffee. Cold brew highlights sweetness, smoothness, and balance in a refreshing and approachable way.

Explore specialty coffee, experiment with brewing ratios, and enjoy the world of cold brew coffee at home.

Discover Specialty Coffee from ROS Coffee

From seed to sip — specialty coffee sourced directly from origin and roasted in Madrid.