PREHEAT oven to 350° F. Paper-line 24 muffin cups.
COMBINE whole-wheat flour, all-purpose flour, cinnamon, baking soda and salt in medium bowl. Beat brown sugar, oil and 2 teaspoons grated orange peel in large mixer bowl until blended. Add pumpkin and eggs; beat well. Gradually beat in flour mixture. Fold in carrots and raisins. Spoon batter into prepared muffin cups, filling 2/3 full.
BAKE for 25 minutes or until wooden pick inserted in cupcake comes out almost clean. Cool in pans on wire racks for 10 minutes; remove to wire racks to cool completely.
BEAT cream cheese, butter, powdered sugar and remaining 1 teaspoon grated orange peel in small mixer bowl until smooth. Spread over cupcakes; garnish with candied orange peel.