Olives for the Perplexed: A Beginner’s Guide
Green or black? Why so many names? Are the cheap ones really olives? If the olive aisle baffles you, start here — the whole thing, demystified in five minutes.
Green vs black is not what you think
Green and black olives are usually the same fruit at different ripeness — green is picked young, black is left to ripen. There is no separate “black olive tree.” And the matte, uniform black olives in cheap cans? Often green olives oxidised black and stabilised with an iron salt — legal, but not what nature does. Naturally ripened black olives, like Nyons or Kalamata, taste of something.
The names are just places and shapes
Most olive names are a town, a region, or a cultivar: Cerignola from a town in Puglia, Kalamata from a city in Greece, Picholine a French variety. Learn six or seven and you have covered most of the deli counter — the rest are variations on a theme.
Raw olives are inedible — every olive you eat has been cured to remove the bitterness (here’s how to do it yourself). How it was cured, and how fresh it is, matters more than the colour. Buy them whole and unpitted, taste before you trust a label, and start with the mild ones.
That is genuinely most of it. The encyclopedia has a page on each variety when you want to go deeper — one honest page per olive.