Without question, the Costco Mousse Recipe on this site. It's very adaptable to other flavors as well, just by changing pudding flavors.http://cakecentral.com/recipes/7308/costco-mousse-recipeYou will love it!
I know this is supposed to be a most saved CAKE thread, but most of my cakes, I guess, aren't worthy. However, my starburst candy roses were popular, with 90 saves. TFL. http://cakecentral.com/gallery/888753