Small marshmallows
1 white cake mix
1 pk strawberry Jello
1 pk frozen strawberries
1 container Cool Whip

Layer pan with marshmallows. Mix cake mix according to directions. Microwave strawberries to thaw for 1 min. Add Jello. Sprinkle a layer of marshmallows over cake. Put Jello and Strawberry mixture over marshmallows. Bake according to directions on box. Refrigerate. When cake is cooled add Cool Whip on top and serve.