Ristretto

A ristretto is a short espresso — the same dose of coffee, less liquid out. That single change alters what ends up in the cup.

The definition

Ristretto means restricted. Where a normale runs to roughly 1:2 (18g in, 36g out), a ristretto stops around 1:1 to 1:1.5 — 18g in, 18-27g out.

Same coffee, same basket, less yield.

What extraction actually does

Coffee compounds do not dissolve at the same rate. Acids and fruity compounds extract early. Sugars and body follow. Bitter compounds and drying tannins come last.

Stopping the shot early means you capture the earlier fractions and leave the later ones behind. That is why a ristretto tastes sweeter, denser and less bitter — not because it is stronger in some general sense, but because it is compositionally different.

The common misconception

A ristretto is often described as "stronger". It is more concentrated, yes, and it is less extracted.

A lungo, run long, is more extracted and often more bitter despite being weaker in concentration. Concentration and extraction are different axes, and conflating them is the source of most confusion about espresso ratios.

Caffeine, briefly

A ristretto contains slightly less caffeine than a normale from the same dose, since caffeine continues extracting through the shot. The difference is modest, and per millilitre it is of course higher.

Grind adjustment

Simply stopping a normale shot early does not make a good ristretto. Because you are aiming for less liquid in a similar time, the grind usually needs to be finer to build appropriate resistance.

Stopping early without adjusting typically gives an under-extracted, sour shot rather than a sweet one — which is why people sometimes try ristretto once and conclude they dislike it.

Which coffees suit it

Darker roasts and chocolate-leaning blends work well: their bitterness is curtailed and their sweetness foregrounded.

Bright, acidic light roasts are riskier, since a ristretto emphasises exactly the early-extracting acids that are already prominent. The result can be sharp rather than sweet.

Where it is used

Ristretto is the base for many milk drinks in specialty cafés, because its concentration and sweetness stand up to milk better than a longer shot. If a flat white tastes better than the espresso at the same shop, this is often why.