Preheat oven to 375 F. Grease muffin tin or line with baking paper cups. Combine the egg, milk, butter and breadcrumbs. Mix and set aside. In another bowl, combine flour, sugar, salt and baking powder. Fold into liquid ingredients. Stir just until moistened. Fill greased or lined muffin tin 2/3 full. Bake 25 minutes. Makes one dozen.