Chiffon cake

A chiffon cake is a very light cake made with vegetable oil, eggs, sugar, flour, baking powder, and flavorings. Being made with vegetable oil, instead of a traditional solid fat such as butter or shortening. Chiffon cakes achieve a fluffy texture by having egg whites beaten separately until stiff and then folded into the cake batter before baking. Its aeration properties rely on both the quality of the meringue and the chemical leaveners such as baking powder. Chiffon cake can be baked in a tube pan or layered with fillings and icings.

Source: Wikipedia