Strawberry Rhubarb Cake

• 1 yellow cake mix and eggs, oil, water called for on box
• 3 cups chopped rhubard
• 2 cups chopped strawberries
• 1 small box strawberry jello
• 1 small bag mini marshmallows

Mix cake mix with called for ingredients and set aside.
Grease 9x13 pan and put rhubarb and strawberry in pan. Sprinkle jello then marshmallows over top. Carefully spread cake batter over top. Bake per cake mix instructions for sheet cake. Top with Cool Whip