Step 1

Preheat the oven to 375°F. In a small bowl, whisk together the flour, sugar and cinnamon. In another bowl, whisk together the egg, sweet potatoes and oil. Whisk the wet ingredients into the dry ingredients just until moistened. Editor’s Tip: Do not overmix the dry ingredients and wet ingredients. Doing so would over-develop the gluten, resulting in dense, tough muffins.

Step 2

Fill greased muffin cups or muffin liners two-thirds full with the batter. Bake the muffins until a toothpick inserted in the center of a muffin comes out clean, 15 to 18 minutes. Cool at room temperature for five minutes before removing the muffins from pans to wire racks.

Step 3

In a small bowl, whisk together the confectioners’ sugar, milk, butter, vanilla and cinnamon. Drizzle the glaze over the warm muffins.