HEAT oven to 400ºF.
COMBINE baking mix, dry gelatin mix and cinnamon. Whisk egg, pumpkin and orange juice in large bowl until blended. Add combined dry ingredients and all remaining ingredients; stir just until moistened.
SPOON into 12 muffin pan cups sprayed with cooking spray.
BAKE 20 min. or until toothpick inserted in centers comes out clean. Cool in pan 5 min. Remove to wire rack; cool slightly.