Preheat oven to 180ºC Grease and flour 2, 23 cm pans. Melt Snickers with milk until smooth. Cool to room temperature. Prepare cake mix according to package directions. Divide batter in half. Stir candy mixture into half the batter. Stir grated orange peel into remaining half. Spoon chocolate (Snickers) batter and yellow batter alternately into cake pans. MARBLED EFFECT! Bake 30-35 minutes. Let stand 10 minutes in pans. Remove cakes and cool on racks. Frost with Fluffy Orange Frosting. Drizzle Chocolate Glze in a circle around edge of cake, allowing it to run down sides. Serves 10-12. CHOCOLATE GLAZE: Melt Snickers and milk together and cool until easily drizzled.