Aioli -A´oli (French spelling) or Ai˛li (Modern Provenšal spelling)- (from Provenšal language garlic (Aiet) and oil (oli), SAMPA [aj'oli]) is a cold sauce made of garlic, egg and olive oil, basically a garlic-flavoured mayonnaise.

In Provence, aioli is served with boiled vegetables, boiled fish, and boiled eggs.

Catalan variant allioli (from Catalan garlic and oil, SAMPA [aLi'oli]) is a thick emulsion of only garlic and olive oil (no egg involved).

Different variants of this sauce exists along the Mediterranean coasts from Andalusia to Sicily.