What is Petit fours?

Petit fours — A small French fancy biscuit or cake often served at the end of a meal. Strictly speaking they're oven-baked little cakes ('four' is French for oven) and were classically made with choux pastry or flan pastry. However, a selection of petits fours these days can cover a wide variety of sweet things, not necessarily cooked, and made possibly with meringue, marzipan, chocolate, and so on.