Sponge fingers are low density, dry, egg-based, sweet sponge biscuits. They are used in many dessert recipes, such as trifles, and are also used as a fruit or chocolate gateau lining and for the sponge of tiramisu. Sponge/finger biscuits are sometimes known by their Italian name Savoiardi, sponge fingers in England, or as Boudoir in France.