Your first shot at home was bad. Probably your first ten. This is fine — even expected. Pulling consistent espresso is a small skill that takes a couple of weeks of small adjustments to learn.
But your second shot can be noticeably better than your first. And the difference is almost always one of the following five things. We’ve listed them in order of how often we see them in the studio.
1 · You guessed the dose
If you scooped the coffee instead of weighing it, you have no idea what your doseDoseThe weight of dry coffee you put into the portafilter, in grams. was. A tablespoon of one bean weighs different to a tablespoon of another. You are not making the same drink twice.
Fix: weigh, with a 0.1 g scale. Same dose every time.
2 · You skipped distribution
This is the one. Every grinder produces clumps. Clumps in the basket mean water finds the path of least resistance and shoots out one spot — channelingChannelingWhen water finds an easy path through the coffee bed instead of flowing evenly. — instead of extracting evenly across the bed. The shot tastes both sour and harsh at once, which is the giveaway.
Fix: WDTWDTWeiss Distribution Technique — stirring the coffee bed with thin needles before tamping. the bed before tamping. Eight thin pins, ten seconds of stirring. It really is that simple.
3 · The grind was wrong
Espresso lives in a narrow range of grind sizesGrind sizeHow fine or coarse the coffee is ground — finer = slower flow, coarser = faster.. Too coarse: the shot rushes out under 20 seconds and tastes sour and weak. Too fine: it chokes the machine and tastes burnt.
Fix: aim for a 25–30 second shot for an 18 g dose pulling 36 g out. If it’s faster than that, grind one notch finer. Slower, one notch coarser. Don’t change two things at once.
4 · The basket was wrong for your dose
Stock baskets on entry-level machines are often optimised for a narrow dose range (sometimes only 14–16 g) and the holes aren’t evenly drilled. If you’re dosing 19 g into a stock 16 g basket, you have no headspaceHeadspaceThe gap between the puck and the shower screen when you lock the portafilter in. and the puck will deform.
Fix: upgrade to a precision basket. The →Ultra Precision Basket takes 17–19 g and has properly drilled holes.
5 · The beans were old
Beans want to be roasted within the last 2–4 weeks for espresso. (Yes, supermarket espresso beans that say “best by 2027” are stale on the shelf.) Fresh beans give off CO₂ — you’ll see the puck bloom and rise as the shot starts.
Fix: buy from a local roaster. Use it within a month of the roast date.
- →Coffee Storage Tubes for keeping the beans you’re drinking now close — and the rest sealed.
If you fix all five and the shot’s still bad — email us. Honestly. We’ll help you figure out which of the dozen less-common things is the culprit. (Probably the water. Or the temperature. Or the puck-screen. We’ve been here.)