1package 4 serving size of instant pistachio pudding mix
Combine all ingredients in large mixer bowl. Blend, then beat at medium speed for 2 minutes. Pour into greased and floured 9 x 13-inch pan. Bake for 30-35 minutes at 350 degrees. Cool and frost. (You can use 2 9-inch rounds for this cake as well.)
Pour the milk into a deep bowl. Add the Dream Whip and the pistachio pudding mix. Beat slowly to blend. Gradually increase speed until mixture forms peaks. Spread on cake.