Petit Four

Petit Four comes from the french "small oven".

This are small confections usually eaten at the end of the meal

Petit four were invented during the process of the cooling of the brick ovens during the 18th century.
There are two different categories:

Petit four sec (dry), usually made with biscuits, baked meringues, macaroons, etc.

and Petit four glacés (iced) usually decorated like miniature cakes with fondant, marcipan or almond paste, or glacé icing