Preheat oven to 350°F (180°C). Spray one Torte Pan with nonstick cooking spray. Place an 8-in. (20-cm) circle of Parchment Paper over center of pan. In Classic Batter Bowl, combine cake mix, sour cream, sherbet and egg; whisk 1 minute or until smooth. Pour batter into prepared pan, spreading to edges. Bake 12-15 minutes or until center feels firm to the touch. Remove pan from oven to Stackable Cooling Rack; let stand 10 minutes. Invert cake onto Cake Pedestal; remove parchment and cool completely.