Indulge in the ultimate Cookies and Cream Sheet Cake! This mouthwatering dessert combines the classic flavors of vanilla cake and Oreo cookies. The cake is light and fluffy, thanks to the use of egg whites. Half of the roughly chopped Oreo cookies are mixed into the batter, while the other half is used for the buttercream frosting. The cake can be baked in different pans if you don't have a jelly roll pan. It can be stored at room temperature for a day or two, or refrigerated for longer storage. You can also freeze the cake without the frosting for up to 2-3 months. When ready to serve, let it thaw and then frost with the delicious buttercream, topped with more chopped Oreos. Enjoy the sweet and irresistible taste of Cookies and Cream Sheet Cake!