How to Make the Perfect Cold Brew Coffee (Smooth & Flavorful Recipe)

Ayako Kidokoro
by Ayako Kidokoro

Learn how to make smooth and flavorful cold brew coffee at home with a Hario Filter-in Coffee Bottle. An easy, refreshing recipe perfect for warm days.

3 min read Published Updated
How to Make the Perfect Cold Brew Coffee (Smooth & Flavorful Recipe)
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There’s just something especially refreshing about a glass of cold brew coffee on a warm day. Smooth, mellow, and easy to prepare ahead, cold brew is perfect for slow mornings, busy afternoons, or whenever you need a caffeine boost. 

Why You’ll Love This Recipe

This simple recipe uses the Hario Filter-in Coffee Bottle a handy bottle that’s well worth having if you enjoy cold brew. Its built-in filter makes brewing and serving easy, letting you prepare smooth, flavorful coffee right in the refrigerator with minimal mess.

Don’t worry if you don’t have a filter bottle, you can still make delicious cold brew using ready-to-steep cold brew coffee bags. However, IMHO, freshly ground coffee still makes the best cold brew, giving you more control over the flavor and a richer, smoother cup!

Key Ingredients 

Coffee Grounds: Use freshly roasted coffee that has been coarsely ground. For a rich and well-rounded cold brew, I especially like UCC Gold Special ground coffee.

Filtered Water: Cold, filtered water helps produce a clean-tasting cold brew. Soft to medium-soft water is ideal because it allows the coffee’s natural sweetness and aroma to come through.

Tips to Know Before You Start
  • Use a coarse coffee grind to help create a cleaner, smoother cold brew and make it easier to filter.
  • When using the Hario Filter-in Coffee Bottle, gradually add the water so the coffee grounds become evenly saturated. 
  • Give the bottle a gentle shake after adding the water, then refrigerate it for about 8 hours.
  • Avoid steeping for significantly longer than necessary, as over-extraction can produce an overly bitter or harsh flavor. 
Variations & Serving Ideas

Customize your cold brew according to your taste. Add vanilla, caramel, maple, cinnamon, or chocolate syrup for extra flavor, or combine the coffee with milk and simple syrup for a sweet-iced latte-style drink. For a dairy-free version, use oat, almond, or soy milk. 

Love refreshing homemade drinks? Explore more easy and delicious beverage ideas with our collection of Japanese-inspired drink recipes!