Sponge cake is a light cake made with eggs, flour and sugar, sometimes leavened with baking powder. Some sponge cakes do not contain egg yolks, like angel food cake, but most of them do. Sponge cakes, leavened with beaten eggs, originated during the Renaissance, possibly in Spain. The sponge cake is thought to be one of the first non-yeasted cakes, and the earliest attested sponge cake recipe in English is found in a book by the English poet Gervase Markham, The English Huswife, Containing the Inward and Outward Virtues Which Ought to Be in a Complete Woman (1615). Still, the cake was much more like a cracker: thin and crispy. Sponge cakes became the cake recognised today when bakers started using beaten eggs as a rising agent in the mid-18th century. The Victorian creation of baking powder by English food manufacturer Alfred Bird in 1843 allowed the addition of butter to the traditional sponge recipe, resulting in the creation of the Victoria sponge. Cakes are available in many flavours and have many recipes as well. Sponge cakes have become snack cakes via the Twinkie.

Baking powder is a dry chemical leavening agent, a mixture of a carbonate or bicarbonate and a weak acid. The base and acid are prevented from reacting prematurely by the inclusion of a buffer such as cornstarch. Baking powder is used to increase the volume and lighten the texture of baked goods. It works by releasing carbon dioxide gas into a batter or dough through an acid–base reaction, causing bubbles in the wet mixture to expand and thus leavening the mixture. The first single-acting baking powder was developed by food manufacturer Alfred Bird in England in 1843. The first double-acting baking powder, which releases some carbon dioxide when dampened and later releases more of the gas when heated by baking, was developed by Eben Norton Horsford in the U.S. in the 1860s.