Citrus coffee

Citrus is acidity you can put a name to, and it is the most reliable signal on a bag that the roast was stopped early. The acids that carry it are the first thing roasting destroys, so a coffee still tasting of lemon or grapefruit was taken off the heat while the farm's character was intact.

Bright is not sour, and the difference is your brew

This is the single most useful thing to know about these coffees. Sourness is under-extraction: the water did not pull enough out of the grounds, and the result is sharp and hollow rather than sharp and sweet. If a citrus coffee tastes sour, grind finer, use hotter water or brew longer, and change one at a time. Water temperature and grind size are the two levers. Bitter and ashy is the opposite fault and means the roast, not the brew.

Which citrus tells you roughly where it grew

Lemon and lime lean toward washed African coffees, Kenya especially. Orange and mandarin turn up in Central American lots and in Ethiopian coffees alongside florals. Grapefruit is the sharpest of them and the most divisive. None of this is a rule you can bank on, because the words are the roaster's, but the pattern holds often enough to be worth reading.

Filter brewing is where it makes sense

A long, gentle extraction is what gets the sweetness out from behind the acidity, so pour over and a good drip machine flatter these coffees. Espresso concentrates everything including acid, which is why a light citrus coffee pulled on default settings often tastes aggressive. It is a whole discipline rather than a fault, and it wants a grinder that holds its setting.

Milk is the wrong destination

Dairy and acidity fight, and what you paid for is the acidity. A citrus coffee in a latte tastes vaguely thin rather than bright. If your coffee always has milk in it, chocolate and nutty coffees at a medium-dark roast will give you far more for the money.

Who it is for

Filter drinkers who have started to notice differences between coffees and want to chase them. It pairs naturally with single origin buying, because these are the coffees where the country on the label actually changes the cup.