On sweltering days, having a jug of cold brew coffee ready in the fridge always brings an extra sense of comfort. Still, many friends often wonder just how long cold brew should steep to keep the liveliness of its origin terroir while avoiding a thin or bitter result. Cold brew is really a gentle contest between low temperature and time, using ice-cold water to slowly soak the coffee grounds so that floral and fruity aromas and natural sugars are released gradually, producing a clear, sweet, and crisp taste.

Because it only ever comes into contact with cold water throughout, the aromatic compounds in coffee are released far more slowly than with hot water. The steeping time is usually recommended to be kept between eight and eighteen hours. If you steep for only six hours, the flavor compounds have not fully opened up yet, and the taste tends to be on the thin side; if you go beyond eighteen hours, deeper bitter and off notes may quietly creep out. Usually, steeping for ten to sixteen hours gives an aroma that is both full and a sweet-tart balance that is very pleasing.

If you want your cold brew to drink as refreshing as chilled fruit juice, choosing the right origin terroir is crucial. Take the high-altitude land of Ethiopia in Africa, for example, which gives coffee an especially bright and light floral-fruity character. This Qianjie Yirgacheffe Natural Red Cherry, after ten hours of slow cold-water extraction, releases clear sweet notes of ripe berries and honey sweetness, clean and smooth on the palate, perfect for friends who enjoy a light fruity-tea feel to savor slowly in the afternoon.

If you prefer intense fruity fermentation flavors, beans from Central and South America often bring surprises. Costa Rica is famous for its excellent microclimates and meticulous processing methods. This Qianjie Mozart uses anaerobic honey processing, and after more than twelve hours of refrigerated steeping, it gives off a captivating osmanthus aroma, sweet notes of fully ripe grapes, and a soft vinous fragrance, with distinct layers and a full body just like a rich non-alcoholic specialty drink.

If you want both elegant floral notes and a craving for full sweetness, Qianjie Strawberry Candy is a very fitting choice. It cleverly blends the delicate citrus florals of Panama Geisha with the high sweetness of Costa Rican honey processing. Use it for cold brew steeped for twelve hours, and as the icy liquid slides across your tongue, it feels like holding a strawberry fruit hard candy, with a long, vibrant finish; whether you are a beginner or a picky connoisseur, you will be captivated by this sweetness.

The method for making cold brew is actually very simple and free-form. Prepare 40 g of medium-ground coffee beans, with a particle size similar to coarse granulated sugar, pour into a sealed bottle, then add 400 g of room-temperature water, keeping the coffee-to-water ratio at 1:10. Shake gently to let the coffee grounds become fully saturated, then close the lid tightly and place it in the refrigerator to steep for ten to fourteen hours. After taking it out, filter away the coffee grounds with filter paper, and the clear coffee liquid you get can be drunk directly over ice, refreshing to the core.

Of course, if you want to experience the beans' original pure flavor before making cold brew, it is also very recommended to first do a baseline tasting with pour-over. Take 15 g of coffee grounds, grind them, and with a water temperature of 91°C, pour 225 ml of water at a coffee-to-water ratio of 1:15. First pour 30 ml of water and let it bloom for 30 seconds, then use a steady staged pour, keeping the total time to around two minutes, and you can fully capture the origin's initial floral and fruity fragrance.

With a clear memory of the hot-brewed flavor, then experiencing the wonderful transformation after more than ten hours of low-temperature slow extraction, the process of drinking coffee gains an extra pleasure of exploring terroir. From the bright floral-fruity notes of Africa to the mellow sweetness of Central and South America, time will slowly unlock the flavor code inside the coffee beans. As long as you master the steeping rhythm and pick a bag of origin beans that suits your taste, you can easily serve an especially soothing icy cold brew at home.