Skip to content
CoffeeLabZ

Espresso

Espresso is a small, concentrated shot made by pushing hot water through a tightly packed puck of finely ground coffee under pressure. In about half a minute you get a syrupy drink with a layer of golden crema on top ☕. People love it because it's intense, quick, and the base for lattes, cappuccinos and flat whites. It's also the fussiest method, so don't worry if your first shots taste odd: every barista started there, and small changes make a big difference.

Grind: Fine, like powdered sugar that still feels a little gritty

Pick your kind

Words you'll hear

Dose
The weight of dry ground coffee in the basket, in grams. 18 g is a common starting dose for a double shot.
Yield
The weight of liquid espresso in your cup, in grams. Weighing beats measuring by volume because crema makes millilitres misleading.
Ratio
Yield divided by dose. A 1:2 ratio means 18 g of coffee becomes 36 g of espresso. Longer ratios taste lighter, shorter ones more intense.
Extraction
How much flavor the water pulls out of the coffee. Too little tastes sour and thin; too much tastes bitter and dry. You're aiming for sweet in the middle.
Crema
The reddish-golden foam on top of a shot, made from gas and oils. Fresh beans make more of it. It's a nice sign, not a measure of taste.
Portafilter
The handle with the metal basket that holds the coffee and locks into the machine's group head.
Tamp
Pressing the ground coffee flat and firm in the basket so water can't sneak through loose spots.
Puck
The packed disc of coffee in the basket. After the shot it's the damp cake you knock out into the bin.
Channeling
When water finds a weak path through the puck and rushes through it. The shot runs fast and tastes sour and bitter at once.
WDT
Stirring the grounds in the basket with thin needles to break up clumps before tamping. Short for Weiss Distribution Technique.