Jaffa Cakes are biscuit-sized cakes introduced by McVitie and Price in the UK in 1927 and named after Jaffa oranges. The most common form of Jaffa Cakes are circular, 2 1⁄8 inches (54 mm) in diameter and have three layers: a Genoise sponge base, a layer of orange flavoured jam and a coating of chocolate.Jaffa Cakes are also available as bars or in small packs, and in larger and smaller sizes.^[2] The original Jaffa Cakes come in packs of 12, 24 or 36.