Other forms: cupcakes
A cupcake is a tiny cake for one person, with cream on top. Frosted cupcakes, bake cupcakes, a birthday cupcake.
The name comes from the measuring, not the shape: the old recipe was a cup of each ingredient, which anybody could remember without scales. The British fairy cake is its smaller and less iced cousin. Note the compound of cup and cake.
1nouncupcakeA small individual cake with icing on top.
“She baked chocolate cupcakes with pink icing for the school party.”
cupcake is a cake.
Cup plus cake, from a recipe measured in cups of each ingredient rather than weighed.
From cup + cake.
Etymology from Wiktionary, CC BY-SA