Muffins and cupcakes may look similar, but they aren’t the same. A cupcake is a mini cake served with whipped icing or frosting on the top. A muffin is a small-sized quick bread with a denser texture than a cupcake. Cupcakes are sweeter than muffins. Besides, they are usually made of cake flour, whereas muffin is made with refined flour. Also, butter and fat are usually higher in cupcakes than in muffins.