if you have ever watched someone make a pour-over, you have seenthe tiny first pour.
they wet the grounds. then they wait.
that pause is called the bloom.
it is not coffee theater. it has a job.
fresh roasted coffee holds carbon dioxide. when hot water hits the grounds, some of that gas escapes. that is why the coffee bed bubbles and puffs up.
if you dump in all the water at once, the gas can get in the way of the water reaching the coffee evenly. the bloom gives it a head start.
here is the easy version.
put your ground coffee in the filter. pour in just enough hot water to wet all of it. start in the middle and work outward. then wait about 30 to 45 seconds.
for a 20-gram dose of coffee, around 40 to 60 grams of bloom water is a good place to start. you do not need to obsess over the exact number. the goal is an evenly wet coffee bed with no dry pockets.
then keep brewing like normal.
if the coffee is very fresh, the bloom may look dramatic. if it has been open for a while, it may barely move. that does not automatically mean the coffee is bad. it just means there is less gas left to release.
my biggest tip is to watch the dry spots. a huge bubbly bloom means nothing if half the grounds never got wet.
tl;dr: the bloom is the first small pour in a pour-over. wet all the grounds, wait 30 to 45 seconds, then finish the brew. it helps the rest of the water move through the coffee more evenly.
want to taste the difference before trying it at home? come drink a pour-over with us at couplet.
coupletcoffee.com / @couplet
gefen