Cool Whip Frosting

1 (8 ounce) container frozen whipped topping, thawed
1 (3.5 ounce) package instant vanilla pudding mix
1 cup milk
1 teaspoon vanilla extract

In a medium bowl, combine pudding mix with milk and vanilla. Mix until
smooth. Gently fold in whipped topping until no streaks remain. Spread
evenly over cake.