Ingredients
Cake:
1 (15.25 ounce) package yellow cake mix
1 cup vegetable oil
1 cup club soda
3 eggs
1 (3 ounce) package instant pistachio pudding mix
Frosting:
1 1/2 cups milk
1 (3 ounce) package instant pistachio pudding mix
1 (1.3 ounce) envelope dry whipped topping mix (such as Dream Whip®)
Directions
Preheat oven to 350 degrees F (175 degrees C). Grease and flour a fluted tube pan (such as Bundt(R)).
Beat cake mix, vegetable oil, club soda, eggs, and 1 package pistachio pudding mix together in a bowl until blended; pour into the prepared pan.
Bake in the preheated oven until a toothpick inserted in the cake comes out clean, 30 to 40 minutes. Turn cake onto a cooling rack and cool completely.
Beat milk, 1 package pistachio pudding mix, and whipped topping mix together in a bowl using an electric mixer on high until frosting forms stiff peaks. Spread frosting on cake.
Source : allrecipes.com