Snickerdoodle Muffins

½ c apple sauce
1 c milk
1 egg lightly beaten
1 tsp vanilla extract
1 tsp cinnamon
½ c sugar
1 c all purpose flour
1 ¼ c whole wheat flour
2 tsp baking powder
½ tsp salt
Topping
½ tbsp cinnamon
1 tbsp melted butter
3/8 c brown sugar
Mix all the ingredients for the muffins in a medium bowl. Bake at 375 degrees for 18-20 minutes or until golden brown. Coat the tops with melted butter. In a small bowl mix sugar and cinnamon. Sprinkle on top of muffins and serve warm or cold.