What is the method for making cold brew coffee? Which coffee beans make the best cold brew?

The Rising Trend of Cold Brew Coffee

Cold brew coffee is taking the world by storm. You may have noticed that in many coffee shops it commands a higher price than other iced drinks. Ever wondered why?

The answer is time. A hot coffee, grinding included, takes less than 10 minutes to make. Cold brew needs at least three to five hours, and some methods run up to 24 hours.

Cold Brew vs. Iced Coffee

Most people distinguish cold brew from iced coffee this way: iced coffee is extracted with hot water first, then poured over ice or chilled down. Cold brew's defining difference is that it uses ice-cold water for the entire extraction, from start to finish.

Extraction is slower at low temperatures, but flavor-wise that's a feature: high temperatures readily break down the tannic compounds in coffee into pyrogallic acid, which reads as sourness and bitterness. Cold brew, by comparison, tastes noticeably mellower — which is exactly why it's so popular.

Unique Characteristics of Cold Brew

The low-temperature method effectively prevents the formation of undesirable compounds, giving cold brew its distinctive flavor profile. Low-temperature extraction also stores beautifully — refrigerated, it keeps for 1–2 weeks. Over time the liquid is said to undergo a slight natural fermentation, and drunk at that stage it takes on a charm not unlike fine wine.

The flavor of cold extraction shifts with roast level, water quantity, water temperature, drip speed, and grind coarseness; finding your perfect ratio takes time and experimentation. Cold brew is mellow, lower in acidity, gentler in bitterness, and grows more complex as it ferments. The trade-off is that it misses some of the aromatics that only heat releases, so bean variety and roast level deserve special thought.

Of course, you can mix cold brew with milk or syrup to taste — the variations are endlessly flexible — but many purists still drink it straight, so the coffee's own character isn't masked by juices or dairy.

The Sensory Experience

Delicious iced coffee may not smell as uplifting and expansive as hot coffee, but the moment it enters your mouth it unfolds layer after layer of flavor, aroma, and texture. And this isn't just hot coffee over ice — it's coffee slowly extracted in cold or ice water that upends everything you expect from coffee, delivering a mellow, wine-like depth together with the pleasure of bracing coolness.

As coffee has become a daily ritual for so many of us, there's another dimension to explore beyond origins and varieties, beyond roast levels, beyond every hot brewing method: cold brew. On a scorching summer day, its gently fermented aroma and cooling sensation are utterly captivating.

Methods of Cold Brew Coffee

Cold brew coffee falls roughly into three families — drip-style, ice-drip style, and immersion style. Their different extraction conditions produce different flavors and textures, but all belong to the cold brew category. The principle is the same as cold-brewing tea: low temperature plus long time slowly draws out the coffee's flavors.

Room-Temperature Drip Method: Extracted with room-temperature water and drunk straight — rich and mellow, like a good whiskey.

Ice-Drip Method: Extracted with ice water and drunk straight — refreshing, like a cocktail.

Immersion Method: The finished coffee is refrigerated to ferment slightly, or the grounds steep at room temperature before chilling — reminiscent of aged rice wine.

Tea-Bag Infusion Method: Coffee in a bag, steeped in cold water and refrigerated — like crisp cold-brew tea.

Choosing Coffee Beans for Cold Brew

So which beans make the best cold brew? Honestly, it comes down to personal preference — there are no strict rules, and the best bean is the one you love. That said, FrontStreet Coffee suggests natural or honey-processed beans, which yield a sweeter cold brew that appeals to almost everyone.

FrontStreet Coffee uses Hartmann and Huakui (Flower Queen) beans to produce a cold brew with a rich, beautifully fermented aroma.

FrontStreet Coffee Recommendation

Cold brewing amplifies florals and fruit while muting woody and roast flavors, so light-to-medium roasts show best — and nothing shows off florals like FrontStreet Coffee's natural Huakui from Ethiopia, coffee's birthplace. Sun-dried in its fruit, the bean absorbs a wealth of sweet aromatic compounds; in cold brew it unfolds magnolia, creamy strawberry, dried mango, guava, and black tea. If you want maximum tropical juice, the Huakui is the one — strawberry, passion fruit, jackfruit, even lychee, with unmistakable sweetness and almost no bitterness, which is why fans call it "the least coffee-like coffee."

For full-on juiciness, FrontStreet's Kenya "Cherry Tomato" is the cold-brew champion: baby tomato, snow pear, black plum, and dark plum acidity shining brightest under cold extraction, low bitterness, wonderful over ice with a lingering finish. It's grown in Thika at 1,550–1,750 meters from SL28 and SL34, processed with Kenya's signature K72 double-washed fermentation and roasted medium-light. Budget-conscious brewers can also blend: many love the passion fruit, grape, apricot, and dried-fruit sweetness of FrontStreet's Colombia Sidra, but at 1 part Sidra to 2 parts FrontStreet Costa Rica Tarrazu you keep the floral-fruit character plus Tarrazu's crisp citrus acidity — and double the value. And for a true showpiece, FrontStreet's Strawberry Candy Gesha blend — Panama Gesha variety with Costa Rica honey process — makes a cold brew of rose, orange, grape, blueberry, and strawberry-gum sweetness that, given a little extra settling time, drinks like fruit wine.