Can You Use Milk to Brew Coffee Powder? How to Make a Delicious Cold Brew Latte?

The appeal of cold extraction lies in how effectively it curbs the bitter compounds that usually pile up in the aftertaste, while the long, gentle extraction coaxes out unique fermented notes and a rich coffee aroma.

What is Milk Brew Coffee?

Traditionally, cold brew means steeping coffee grounds in cold water to make a black coffee. But as coffee lovers have gotten more adventurous, a new trend has taken hold in recent years: "milk brew." The idea is simple — replace the water with milk or a plant-based milk. So how does it taste?

Why Use Milk to Brew Coffee?

Compared with the bitter-sweet profile of black coffee, many people prefer the smooth texture of milk coffee — the latte being the classic example. It goes down easily yet keeps the full coffee aroma, plus a touch of milky sweetness.

In a milk brew, though, milk stops being a diluting or balancing agent for espresso. Instead, it becomes the extraction medium itself, drawing flavor compounds out of the grounds over long contact to build a moderately concentrated milk coffee. And because milk is rich in proteins and milk fats, it further slows the release of certain sweet compounds, producing a lower extraction rate and an extra-smooth result.

How to Make Cold Brew Latte? What Parameters to Use?

FrontStreet Coffee couldn't trace the exact origin of milk cold brew, but there are plenty of tutorials online to reference. With the right ingredients, the whole process — from grinding to filtering — takes just five easy steps. It's genuinely a technique anyone can master.

To keep the result from turning sour or bland, FrontStreet Coffee recommends medium-dark roast beans with caramelized aromas — look for tasting notes like chocolate, hazelnut, caramel, cream, spice, or cocoa on the bag. Examples include Papua Paradise Bird, Brazil Queen Estate, and Colombia Huila, or espresso beans described with fermented, buttery cookie, or dried fruit notes. FrontStreet Coffee's Sunflower Warm Blend, for instance, works beautifully for milk cold brew.

To get the most aromatic result, the coffee-to-milk ratio matters. After multiple side-by-side comparisons, FrontStreet Coffee found that a ratio between 1:10 and 1:13 gives the most balanced flavor — a robust texture similar to a well-stirred Dirty coffee.

Also, grind the beans fresh just before extraction to keep as much aroma as possible. For milk, choose fresh milk with higher lactose and milk fat — the kinds of brands commonly stocked in coffee shops (Bright Dairy, Meiji, Kowloon Dairy, Wei Chuan) all make for a silky-smooth milk coffee.

Two Methods for Milk Extraction

Like regular cold brew, milk extraction can be done either by direct steeping or with a filter bag. Pick whichever suits your tools.

Direct steeping is the most convenient: all you need is a clean sealed container and filter paper, and it lets the coffee's soluble compounds infuse fully into the milk, finishing in 5–6 hours. Its main drawback is the slow filtering afterward. A filter bag holding the grounds is far more convenient, but because the bag separates the grounds, milk — which extracts less readily than water — needs extra steeping time to let the coffee fully "open up."

Materials and Parameters

Materials needed: fresh milk, coffee grounds, a clean sealed container, a tea bag (filter bag).

Parameters: 20 grams of Elida Estate Catuai beans, 1:10 coffee-to-liquid ratio (add 200g of milk), fine sugar grind (EK43s at setting 10 / 80% passing through the China #20 standard sieve), 8 hours of low-temperature steeping. Let's begin!

FrontStreet Coffee first grinds 20 grams of the Elida Estate beans to a coarse-sugar consistency and places them in a tea bag.

After tying the string tightly, place the bag in the container. (Make sure the bag is securely closed so no coffee particles escape.)

Then take fresh milk from the refrigerator and pour in 200ml. Use a spoon to make sure the coffee bag is fully submerged. Finally, cover with a lid (or seal with plastic wrap) and refrigerate for 8 hours.

Once it's done steeping, simply remove the coffee bag and you have a rich, chilled milk coffee. It enters the mouth with a thick, luxurious texture and flavors reminiscent of peach cookies. The profile is fairly concentrated, so feel free to add ice. (Since milk is highly perishable, FrontStreet Coffee recommends drinking your milk brew the same day it's made.)

Drip Coffee Bags Can Also Make Milk Brew Coffee

If you have drip coffee bags and a bottle of fresh milk, making milk brew gets even easier. Using the ratio above as a guide, one 10-gram drip bag pairs with 100–130ml of fresh milk. So with a 250ml bottle, use two drip bags for a stronger coffee flavor.

The operation couldn't be simpler: place the unopened drip bag, hanging ear and all, directly into the milk. Tighten the cap, shake gently, and refrigerate overnight. The next morning, give it another shake, remove the bag, and your coffee is ready.

One caution: when cold-brewing with drip bags, remove the cardboard outer packaging and keep only the "naked" filter bag in the milk, or it will affect the coffee's taste.

FrontStreet Coffee Recommendation

Cold extraction amplifies florals and fruit while softening woody, roasty notes — so light-to-medium roasts shine here. Two FrontStreet Coffee picks for cold brew:

FrontStreet Strawberry Candy (Geisha Blend): Combines Panama's classic Geisha with Costa Rican honey-process coffee — one contributing delicate rose and orange, the other grape, dried blueberry, and strawberry-soft-candy sweetness. Cold brewed, it's sweet-tart and vibrantly fruity, and with a little extra settling it can even take on a fruit-wine-like character.

FrontStreet Kenya Cherry Tomato: For a cold brew bursting with juice. Cherry tomato, snow pear, black plum, and dried plum notes show their full sweet-tart range under cold extraction — low bitterness, full acidity, and wonderfully refreshing over ice. From the Thika region, grown at 1550–1750 meters from SL28 and SL34, given Kenya's signature 72-hour double-washed fermentation and a light-medium roast.

Budget tip — FrontStreet Colombia Pink Bourbon + FrontStreet Costa Rica Tarrazú: Cold brew uses more coffee than pour-over, so instead of pricey top lots, blend for value: add Tarrazú to Pink Bourbon at a 1:2 ratio. You'll keep Pink Bourbon's passion fruit, grape, apricot, and dried-fruit sweetness while gaining Tarrazú's crisp citrus acidity — flower-and-fruit flavor at a friendlier price.