1. CAKE:. 2. In a large mixing bowl, combine the cake mix, pudding mix, water and egg whites. Beat on low speed for 1 minute; beat on medium for 2 minutes. 3. Pour into a 15-in. x 10-in. x 1-in. baking pan coated with cooking spray. 4. Bake at 350° for 12-18 minutes or until a toothpick inserted near the center comes out clean. Cool completely on a wire rack. 5. FROSTING:. 6. Place milk and extract in a large bowl. Sprinkle with a third of the pudding mix; let stand for 1 minute. Whisk pudding into milk. 7. Repeat twice with remaining pudding mix. 8. Whisk pudding 2 minutes longer. Let stand for 15 minutes. 9. Fold in whipped topping. Frost cooled cake. Garnish with chocolate curls if desired.
