Olives: A Cook’s Guide

Faced with a deli counter of twenty olives, most people pick by colour and hope. You can do better. Here is a working cook’s guide — which olive for which job, and what to swap when your shop fails you.
Olives sort into two broad jobs: table olives (for eating) and oil olives (for pressing). At the table, the choice is really about intensity and texture.
For snacking and boards
Reach for the mild giants — Cerignola and Castelvetrano — buttery, low-bitterness, the olives even olive-sceptics like. Add a bowl of Gordal for size and a few Picholine for crunch.
For cooking
You want flavour that survives heat: Kalamata for anything Greek, tapenade or a tomato braise; Nyons or other soft black olives for a daube or a lamb dish. Avoid wasting the delicate Lucques in a hot pan — its whole gift is raw texture.
For a martini or an apéritif
A mild green olive that won’t bully the gin — Castelvetrano or a small Manzanilla — not a loud, winey Kalamata.
Match by role, not colour. Need a big mild green olive and your shop is out of Cerignola? Castelvetrano or Gordal. Out of Kalamata? Gaeta or another brine-cured black. Out of Lucques? Picholine. Every variety in the encyclopedia lists its best substitutes for exactly this moment.
And whatever you buy, buy it with the stone in and pit it yourself. Pre-pitted olives sit in brine and go soft — you are paying for convenience with texture.