Whenever I bake cupcakes, the kids always call them muffins. They say it just to annoy me but cupcakes & muffins are different creatures, although there is some overlap. Most often, cupcakes have frosting. Sometimes way too much frosting; more frosting than (cup) cake.
I have attempted to improve the health quality of these cupcakes by using wholemeal flour, reducing the sugar and using less icing (frosting). It could be argued that by trying to increase the health factor, I am straying into Muffin territory.