Sour? Grind finer.
Bitter? Go coarser.
Can you dial it in?
A coffee-brewing puzzle built on the real brewing control chart. 25 picky customers, 5 brewers from espresso to cold brew, and a handful of tries to get each cup right. Every brew lands on the chart so you can see what went wrong.
International Coffee Day (1 October) starts in
Pick your cup
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Café Campaign
25 hand-made orders across five brewing stations: a broken grinder, a stubborn kettle, mystery beans and a customer who only wants ristretto.
Start brewing →Rush Hour
Six random orders, four brews each. Random brewers, random beans, random targets. Chase a high score and dare a friend to beat it.
Open the doors →Which Brew Are You?
Ten questions, twelve coffee personalities, from the Straight-Shooter Espresso to the Dessert-First Affogato. Each one is drawn as its own layered glass.
Find your brew →Coffee IQ
40 questions on coffee history, science and culture, with 10 random ones against the clock each round. Who invented the paper filter? Why is the V60 called that?
Test yourself →The science you'll be playing with
Taste, read, adjust
Every real barista does this loop dozens of times a morning. It's called “dialling in”.
1 · Read the order
Each customer wants a cup inside a target box: how extracted (sweet vs sour or bitter) and how strong.
2 · Set the dials
Grind, dose, water, temperature, steep time. Some are locked, because cafés are chaos.
3 · Brew and taste
Your cup lands on the chart and the customer tells you how it tastes. Adjust and go again.