Donut Muffins

Muffin (enriched flour [wheat flour, malted barley flour, niacin, iron, thiamin, riboflavin, folic acid], buttermilk, canola oil, granulated sugar, eggs, baking powder [sodium acid pyrophosphate, sodium bicarbonate, cornstarch, monocalcium phosphate], vanilla extract, salt, and nutmeg), butter, granulated sugar, and cinnamon.