Cool Whipped Frosting

My friend made her daughter a birthday cake.  I really really awesome Tangled theme birthday cake.  She shared a few tips on her blog today about how to make a cake taste really top notch.  I guess freezing the cake overnight is the key.  I have been doing that for a while, but I did it out of convenience and not realizing that is why my cakes were so moist. 
She also uses the same cool whip frosting recipe that I use for birthday cakes.  (When I don’t use a can)
The recipe comes from Allrecipes.com
Here’s the Frosting recipe: 1 (8 ounce) container frozen whipped topping, thawed 1 (3.5 ounce) package instant vanilla pudding mix 3/4 cup milk (you can add more if you think you need it) 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. * I have used food color gel in this and it works great.  Food color powder is also a good choice. * Happy baking! (when I get permission, I will post a picture of the cake she made)