What is a ristretto? Ristretto vs espresso, ratio and grind

How is a ristretto different from an espresso?

The dose is the same, and the yield is smaller. That makes the ratio tighter. 1Zpresso puts a ristretto at about 1:1 to 1:1.5, against about 1:2 for a standard shot.

The dose and liquid comparisons follow Wikipedia and 1Zpresso. Perfect Daily Grind's dialing guide also lists 1:1.5 as the more concentrated option alongside a standard 1:2.

Why does a ristretto taste less bitter?

Because it stops before the slower, bitter compounds come out. Wikipedia explains that different compounds dissolve at different rates. A ristretto captures the faster-dissolving ones and leaves more of the rest behind.

The first part of any shot is also the most concentrated. Wikipedia notes it runs dark chocolate to umber in color. A ristretto is mostly that early, heavy portion.

The tradeoff is that less dissolves overall. Wikipedia says that includes less caffeine than a full-length shot.

Is a ristretto stronger than an espresso?

It is more concentrated, but it is not more caffeinated. The liquid is denser in flavor because the same coffee goes into less water. Wikipedia describes the first part of the shot as the most concentrated, and a ristretto is mostly that part.

Caffeine runs the other way. Because the shot stops early, less of everything dissolves. Wikipedia says fewer compounds, caffeine included, end up in a ristretto, and 1Zpresso says it has slightly less caffeine than a standard espresso. If you want a smaller, sweeter drink with less of a jolt, a ristretto fits.

How long does a ristretto take?

Sources disagree, partly because grind changes the time. 1Zpresso gives 15 to 20 seconds, shorter than its 25 to 30 for espresso. Wikipedia says a ristretto still runs 20 to 30 seconds, with half the water.

The difference comes down to grind. If you keep the espresso grind and stop early, the shot is shorter. If you grind finer, the flow slows and a ristretto can take about as long as a normal shot.

Do you grind finer for a ristretto?

Usually, yes. 1Zpresso recommends a slightly finer grind than for standard espresso. The finer grind slows the water and makes up for the shorter extraction.

This makes ristretto demanding on a grinder. You are already in the finest part of the range, and the change is small. Baratza notes that a few dozen microns of burr movement can shift a shot by several seconds.

A grinder that adjusts in very small steps, or is stepless, makes that move easier. The grinder finder can filter to espresso grinders.

Is a ristretto used in milk drinks?

Yes, often. Wikipedia says that diluted with milk or water, a ristretto tastes less bitter and more intensely of espresso than a regular shot.

1Zpresso notes that Starbucks uses ristretto shots as the base for its Flat White and Cortado. That fits the stronger coffee flavor a flat white is known for.