Light-roast espresso: keep one recipe and adjust one setting

Start with one measurable espresso recipe

Light-roast espresso is not a fixed machine setting. Start with one repeatable recipe, then change one variable at a time. Baratza's dial-in guide gives a source example: 18 g of coffee, 36 g of liquid espresso, and a 25 to 32 second shot. It also advises a finer grind for a quick, sour shot and a coarser grind for a slow, bitter shot. La Marzocco notes that light roasts often use a larger brew ratio and higher brewing temperature. Treat these as bounded starting points, not rules for every coffee.

Record for each shot	Why it helps
Dose in	Keeps the coffee amount clear
Espresso out	Lets you compare the same yield
Time from pump start	Shows whether the flow changed
Grind setting	Gives the next adjustment a reference

Change the grind first

Keep the dose and target yield the same for the next shot. If the shot reaches its target yield unusually fast and tastes sour, make the grind finer. If it runs unusually slow and tastes bitter, make the grind coarser. Baratza recommends small changes and a written record.

Do not change the grinder setting, dose, yield, temperature, and distribution at once. That makes the next shot hard to read. If the shot remains uneven, check puck preparation before you blame the roast.

Use how to dial in espresso for the broader method. The espresso ratio calculator can keep the dose and yield visible while you work.

Keep the limits visible

Freshness, water temperature, grinder range, and basket size can all affect the result. Baratza's published recipe is a useful starting point, but it does not prove the best recipe for a specific coffee or machine. Follow your machine manual when it gives a setting limit.

We read Baratza's dial-in guide and La Marzocco's Basic Espresso Theory on September 21, 2026. We did not physically test, own, prepare, taste, or measure this method.