-
Preheat oven to 350F. Lightly grease a muffin tin with cooking spray.
-
In a large bowl, beat together sugar and egg until light in color.
-
In a small bowl, whisk together flour, baking powder, salt and cinnamon.
-
Pour into egg mixture and stir to combine.
-
Pour in vegetable oil, milk and vanilla extract.
-
Divide batter evenly into 12 muffin cups, filling each about ¾ full.
-
Bake for 15-18 minutes, until a tester inserted into the center comes out clean.
-
While muffins are baking, melt butter and pour remaining sugar into a small bowl.
-
When muffins are done, lightly brush the top of each with some melted butter, remove from the pan and roll in sugar.
-
Cool on a wire rack.