Does Drip Bag Coffee Need Blooming? How to Brew Drip Bag Coffee for the Best Taste?

Recently some friends asked whether blooming is necessary when brewing drip bag coffee. In this installment of our Coffee Brewing Laboratory, we test exactly that.

Experiment Setup

For this experiment we used FrontStreet Coffee's Yirgacheffe drip bag coffee, with each bag holding 10 g of pre-ground coffee. The water temperature was set at 90°C, with a target coffee volume of 150 ml. We made a careful side-by-side comparison between one group with blooming and another without.

Experimental Process

Blooming Method, Step by Step: Prepare a cup, then tear open the outer packaging of the drip bag coffee. Inside is a white filter bag. Tear along the line marked "Open," unfold the "ears" on both sides of the filter bag and hang it on the cup.

For the first pour, simply wet the coffee grounds completely and let it bloom for 30 seconds. During blooming there was not much burger-like puffing, and a small amount of coffee liquid flowed out of the filter bag.

After blooming, make the second pour. Use a small stream and pour in circles until full. Wait for the coffee bed to settle a little, then pour again until full. Repeat until the coffee in the cup reaches about 140-150 ml, then remove the drip bag.

Non-Blooming Method, Step by Step: Prepare a cup, then tear open the outer packaging of the drip bag coffee. Inside is a white filter bag. Tear along the line marked "Open," unfold the "ears" on both sides of the filter bag and hang it on the cup.

Pour water in circles directly until the filter bag is full. Wait for the coffee bed to settle a little, then pour again until full. Repeat until the coffee in the cup reaches about 140-150 ml, then remove the drip bag. (Small bubbles appeared when the bag was filled for the first time.)

Flavor Comparison

With Blooming: Blooming lets the degassed coffee particles absorb water and saturate evenly, which allows a more uniform extraction afterward. The resulting flavors are richer, with both citrus and berry notes well expressed.

Without Blooming: The direct-pour method produces flavors quite close to the bloomed version, also showing citrus and berry notes, but comparatively lighter and more watery, with more pronounced acidity.

Drip bag coffee was designed for convenience, but when it comes to pouring technique, wetting the grounds with a small amount of water before brewing extracts more coffee compounds. This small gesture, taking only 30 extra seconds, yields a better cup. Why not give it a try?

FrontStreet Coffee Recommendation

The cup used in this test is built on Yirgacheffe, and if you want that profile at home, FrontStreet Coffee's washed Yirgacheffe is the place to start. Known for white jasmine, bright citrus and lemon acidity and a tea-like body, it pairs that character with a friendly price, which is why it has become so many people's first specialty coffee.

If you prefer more fruit, FrontStreet Coffee's natural Red Cherry is made only from fully ripe, defect-free cherries, dried whole on raised beds for three to five weeks with turning every few hours at the start so the fruit does not ferment unevenly. Because the cherry dries on the bean, it keeps the typical Yirgacheffe character while adding tropical fruit, a citrus-like acidity, a berry-juice quality, honey sweetness and a creamy smoothness that blooms and extracts just as well in a drip bag.