Custard Cake with Raspberry Sauce 1 (18.25 ounce) box yellow cake mix 1 egg 1/2 cup margarine Mix these ingredients and press into a lightly greased 9 x 13-inch pan. Topping 8 ounces cream cheese 3 eggs 4 cups confectioners' sugar 1 bottle Smucker's Raspberry Sauce Combine cream cheese, eggs and confectioners' sugar. Mix well and pour over top of cake mixture and bake at 350 degrees F for 45 to 50 minutes. To test for doneness, the top will be set when touched and lightly brown. Sprinkle with confectioners' sugar then swirl raspberry sauce over the top.