Use a folding technique to incorporate light airy ingredients, such as thawed COOL WHIP Whipped Topping, beaten egg whites or whipped cream, into heavier mixtures, such as thickened JELL-O Pudding or prepared cake batter. Start by stirring a small amount of the lighter mixture into the heavier mixture to thin it slightly. Then, blend the remaining two mixtures by using a rubber spatula to gently cut down vertically into both mixtures, then scraping the spatula across the bottom of the bowl and up the side to fully incorporate the two mixtures, rotating the bowl as you go.