How to Make Milk Brew Coffee — The Korean and Japanese Method That Skips Water Entirely

Milk brew coffee poured over ice

Walk into a specialty café in Seoul or Tokyo and you'll find a quiet rebellion against the standard cup of coffee: milk brew. Instead of steeping grounds in water and adding milk afterward, the coffee is steeped directly in milk from the very beginning. The result is a naturally sweet, velvety, low-acid cup that tastes more like dessert than your average iced coffee — and it's becoming one of the most requested drinks at coffee bars across Korea and Japan.

Iced milk brew coffee in a tall glass with a small pitcher of milk and jar of coarse ground coffee

What Makes Milk Brew Different

Traditional cold brew steeps coarse coffee grounds in room-temperature or cold water for 12–24 hours, extracting caffeine and flavor slowly. Milk brew uses the exact same long, slow steep — but swaps water for whole milk (or a high-fat alternative milk). Because milk has fat and protein, it extracts coffee compounds differently than water does. The fat binds to some of the bitter, acidic notes and mellows them out, while the natural lactose adds a soft sweetness. You end up with a cup that's smoother and less acidic than a standard cold brew with milk stirred in.

Why It Caught On in Korea and Japan

Korean and Japanese coffee culture has long favored precision and patience — think pour-over bars with gram scales and slow, deliberate technique. Milk brew fits that same philosophy: a long, unhurried steep that rewards patience with a noticeably different texture and flavor than anything rushed. It also pairs naturally with the popularity of milk-forward drinks in both countries, from Japanese milk coffee (kissaten-style) to Korean café menus built around creamy, lightly sweet iced drinks.

What You'll Need

  • Coarsely ground coffee (a medium-dark roast works especially well) — try our Brazilian Santos Coffee or Colombian Huila Single-Origin
  • Whole milk (oat milk with at least 3g fat per serving is the best dairy-free substitute)
  • A large jar or pitcher with a lid
  • A fine mesh strainer or cheesecloth
  • For the freshest grind, a burr grinder like the Baratza Encore makes a noticeable difference

Use a ratio of about 1 part coffee to 8 parts milk by weight (for example, 60g of coarse grounds to 480ml of milk). You can adjust to taste once you've made it once or twice.

Step-by-Step Method

  1. Combine. Add your coarsely ground coffee to a clean jar or pitcher, then pour in the milk. Stir gently to make sure all the grounds are saturated.
  2. Steep. Cover and refrigerate for 12 to 18 hours. Steeping in the refrigerator (rather than at room temperature) keeps the milk safe and fresh over the long steep.
  3. Strain. Pour the mixture through a fine mesh strainer lined with cheesecloth into a clean container. Let it drip through slowly rather than pressing the grounds, which can push bitterness into the final brew.
  4. Serve. Pour over ice as is, or dilute slightly with a splash of plain milk if the concentrate is too rich. A little simple syrup or condensed milk on top turns it into a Korean-café-style treat.
  5. Store. Keep refrigerated in a sealed container and enjoy within 4 to 5 days.

Tips for the Best Cup

  • Stick with whole milk or full-fat alternative milk — low-fat versions extract less flavor and can taste thin.
  • A medium-dark or dark roast holds up best against the richness of milk; very light roasts can get lost.
  • Don't rush the strain. Letting gravity do the work (instead of squeezing the cheesecloth) keeps the final cup smooth instead of muddy.
  • If you want a stronger jolt, brew it a little more concentrated and dilute to taste rather than over-steeping, which can introduce bitterness.

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