Poke Cake

1 pkg. white cake mix
1 pkg. any flavor Jello
1 c. boiling water
1/2 c. cold water
1 container Cool Whip

Bake cake per box instructions. Cool completely, about 1 hour. Poke cake all over with fork, chopstick, or other poking device. Stir Jello and boiling water until smooth, stir in cold water. Pour over cake. Run knife around sides of pan to loosen cake. Refrigerate 2 hours. Frost with Cool Whip. Store covered in refrigerator.