Buying guides
Kettles and scales: what actually matters
A spout you can aim, water at a repeatable temperature, a scale that reads 0.1 g fast enough. What to pay for in kettles and scales, and what to skip.
Ratio
Ristretto to lungo, the filter ratios worth memorising, and what each one does to the cup.
Buying guides
Articles
Volumetric, paddle or button
How a bar machine decides when to stop a shot, why volumetric dosing drifts, and what a paddle gives back to the person holding it.
Brew ratio, explained
Dose against yield, why it is written 1:2, and what actually changes as you go shorter or longer. Plus the difference between strength and extraction.
The ristretto base, explained
A ristretto is not a small espresso. It is the first two thirds of one, and the grind has to move with it or the shot runs fast and sour.
Why your latte tastes thin
A weak latte is usually arithmetic, not a weak machine. Check the ratio, then the shot, then the milk temperature, then the cup, in that order.