Jell-O Cake

1 pkg. yellow cake mix cooked
2 pkg. jell-o mix
2 c. boiling water
8 oz. whipped topping

Make cake using directions on box.  Dissolve jell-o in boiling water.  Use a fork and poke the cooled cake at half inch intervals.  Spoon jell-o over cake and chill.  Cover with a layer of whipped topping