- Preheat oven to 375°. In a small bowl, combine flour, sugar and cinnamon. In another bowl, whisk egg, sweet potatoes and oil. Stir into dry ingredients just until moistened.
- Fill greased muffin cups two-thirds full. Bake 15-18 minutes or until a toothpick inserted in muffin comes out clean. Cool 5 minutes before removing from pans to wire racks.