Which of these confections was at the centre of a legal dispute as to whether it was a cake or a biscuit?

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, 21⁄8 inches (54 mm) in diameter and have three layers: a Genoise sponge base, a layer of orange flavoured jelly and a coating of chocolate. Jaffa Cakes are also available as bars or in small packs, and in larger and smaller sizes. The original Jaffa Cakes come in packs of 12, 24 or 36.

Because McVitie's did not trademark the name "Jaffa Cakes", other biscuit manufacturers and supermarkets have made similar products under the same name. The product's classification as a cake or biscuit was part of a VAT tribunal in 1991, with the court finding in McVitie's favour that the Jaffa Cake should be considered a cake for tax purposes. In 2012 they were ranked the best selling cake or biscuit in the United Kingdom.