Starting recipe: 18 g in, 36 g out, ratio 1 to 2, 25 to 32 seconds, 91 to 94 °C.
Dose
18g
Yield
36g
Ratio
1:2
Time
25–32s
Temp
91–94°C196–201 °F
Grind: dial 1–16
The Breville Barista Express grind dial runs from 1 (finest) to 16. For espresso in the non-pressurized basket, start a few steps finer than the middle, then move one number at a time. Change one thing per shot.
Temperature
91–94 °C (196–201 °F). Change the brew temperature in the machine's settings menu.
Freshness: 10 days off roast
A good window for espresso. Small grind changes should be all you need from here.
If it tastes sour
Grind finer by one click so the shot runs slower.
Pull a longer shot: try 41 g out.
Raise the temperature 1–2 °C (2–4 °F).
If it tastes bitter
Grind coarser by one click so the shot runs faster.
Pull a shorter shot: try 31 g out.
Lower the temperature 1–2 °C (2–4 °F).
Breville's 54 mm double basket holds about 18 g. Overfilling makes the puck touch the shower screen.