1. Preheat oven to 350°F. In a large mixing bowl, cream together sugar and butter. Add eggs and beat until airy. Next, add vanilla and applesauce and mix until incorporated.
2. In a separate bowl, combine flour, baking powder, cinnamon and salt. Whisk together. Add dry ingredients to the large applesauce bowl.
3. Place muffin liners in a muffin pan. Pour to 3/4 way full. Bake for 15 minutes, or until toothpick comes out clean.
4. Once muffins are cool enough to handle, dip top in melted butter. Roll in cinnamon sugar to create a sweet topping!