Preheat oven to 350°F. Mix flour, cocoa powder, cinnamon, baking powder and salt in medium bowl. Set aside.
Mix sugar, applesauce, eggs and vanilla in large bowl until well blended. Gradually stir in flour mixture until well mixed. Stir in chocolate chips. Spoon 1/4 cup batter into each of 15 paper-lined muffin cups.
Bake 15 minutes or until toothpick inserted into center of cupcake comes out with fudgy crumbs. Cool in pans on wire rack 10 minutes. Remove from pans; cool completely on wire rack.