HEAT oven to 350 degrees F. Line 24 muffin cups with paper baking cups.
COMBINE cake mix, orange juice, marmalade, oil and egg whites in large bowl. Blend with electric mixer until moistened. Beat on medium speed for 2 minutes. Blend in cranberries and orange rind. Fill baking cups 2/3 full.
BAKE 18 to 22 minutes or until toothpick inserted in center comes out clean. Cool cupcakes in pans on wire racks 5 minutes. Remove from pans. Cool completely on wire racks.
STIR orange peel into frosting until blended. Frost cupcakes, garnish with additional orange peel, if desired.