Jell-O Poke Cake

1 pkg. white cake mix
1 c. boiling water
1 pkg. (4-serving size) Jell-o
½ c. cold water
8 oz. Cool Whip

Prepare white cake as directed on package in 9 x 13” pan. Cool cake 15 minutes. Pierce cake with large fork at ½” intervals. Stir boiling water into dry gelatin mix in small bowl 2 min. until completely dissolved. Stir in cold water; carefully pour over caked. Refrigerate 3 hours. Frost cake with cool whip. Refrigerate at least 1 hour before serving. Store leftovers in fridge.