Cupcake vs muffin
What is the difference between cupcakes and muffins?
A cupcake (the common US and Australian term) or fairy cake (the common British term), is a small cake designed to serve one person, frequently baked in a small, thin paper cup. As with larger cakes, frosting and other cake decorations, such as sprinkles, are common on cupcakes.Cupcakes usually have icing on them and are supposed to be little, miniature cakes.
A muffin is a type of bread that is baked in small portions. Many forms are somewhat like small cakes or cupcakes in shape, although they usually are not as sweet as cupcakes and generally lack frosting. Savory varieties, such as cornbread muffins, also exist.
Muffins are often eaten for breakfast, alternatively, they may be served for tea or at other meals. Muffin ingredients are lighter, and it's more of a bread based food.
I hope that helps.