Grandma's Jello Cake

Another tradition: Grandma's special Jello cake...delicious! No ideas how to make this healthy...but HAPPY BIRTHDAY GRANDMA! Thanks for always being there for me.

INGREDIENTS:
1 box white cake mix
1 3 oz pkg strawberry or raspberry Jello
1 C hot water
1 3 oz pkg instant vanilla pudding
1 1/2 C milk
Cool Whip (to top)

DIRECTIONS:
1. Prepare cake mix and bake as directed.  While hot, prick holes all over top with fork.  Dissolve Jello in hot water and pour over cake.  Cool in fridge.  When cool, spread vanilla pudding over cake.  Top with Cool Whip.