The main ingredient in a cupcake is flour. Typically, all-purpose flour is used to create the base of the cupcake batter. Other essential ingredients include sugar, eggs, butter, and baking powder, which work together to create a light, airy texture. Once mixed, the batter is poured into small cake cups and baked until fluffy and golden. Cupcakes can be customized with various flavors, fillings, and frostings, making them a popular choice for celebrations and desserts. Their individual servings and decorative options also add to their appeal, allowing for creative presentations at events.