if you've ever nodded along when someone said "double shot" without knowing what that means, this one's for you.
espresso isn't a type of bean or a roast. it's a brewing method. any coffee can be espresso - what makes it espresso is how it's made.
what espresso actually is
hot water gets forced through a tight puck of finely ground coffee at high pressure. that's the whole idea. the result is a small, concentrated drink - about 25-30ml, roughly a shot glass - with a syrupy body and a layer of golden foam on top.
the numbers behind a shot
here's what a cafe is doing when they pull your shot:
- pressure: 9 bars. that's about 9x the pressure of the atmosphere, which is why espresso machines are loud and expensive.
- ratio: 1:2. about 18g of ground coffee in, about 36g of liquid out.
- time: 25-35 seconds. too fast and it's sour and thin, too slow and it's bitter.
that's it. pressure, ratio, time. when a barista "dials in" a coffee in the morning, they're tweaking the grind until those three numbers line up and the shot tastes right.
what's that foam on top?
it's called crema. the pressure emulsifies the coffee's natural oils and traps tiny CO2 bubbles, which rise to the top as a golden layer. fresh coffee makes better crema - a shot with no crema usually means stale beans or a rushed pull. it looks pretty and it's a decent freshness signal, but it's not the whole story. taste matters more than foam.
is espresso stronger than coffee?
per sip, yes. per cup, no.
one shot of espresso has about 63mg of caffeine. a regular 12oz drip coffee has more total caffeine - it just takes you longer to drink it. espresso tastes "stronger" because it's concentrated, not because there's more caffeine in it. if you want the full caffeine deep-dive, we did the math in matcha for dummies.
where it came from
espresso is italian, and it exists because people were impatient. in 1884, a guy in turin named angelo moriondo patented a machine that used steam pressure to brew coffee faster for busy cafes. luigi bezzera improved on it around 1901 with the single-serving machine, and in the 1940s achille gaggia added the spring-loaded lever that created modern pressure - and with it, crema. the whole thing was literally invented to serve coffee quicker. respect.
the one thing to remember
espresso = coffee + pressure + about 30 seconds. everything else on the menu is just what you add to it.
next up: every drink on the menu decoded - latte vs flat white vs cortado vs all the ones you've been afraid to ask about. in the meantime, come try a shot at any of our cafes - we'll make it make sense.
what's your espresso order? or are you still a "whatever's easiest to say" person?