Rainbow Cake
["1 box cake mix", "1 (3 oz.) pkg. strawberry Jell-O", "1 c. boiling water", "1/2 c. cold water", "2 c. Cool Whip"]
["Prepare cake as directed.", "Bake in a 13 x 9-inch pan.", "Cook cake in pan 15 minutes, then prick with utility fork at 1/2-inch intervals.", "Meanwhile, dissolve gelatin in boiling water.", "Add cold water and carefully pour over warm cake.", "Chill 3 to 4 hours. Top with Cool Whip."]
["cake mix", "strawberry Jell-O", "boiling water", "cold water"]