1 (18 1/4 oz.) yellow cake mix
3 (3.4 oz.) pkg. instant pistachio pudding mix
1 c. water
1 c. vegetable oil
4 eggs

Glaze:

1 c. confectioners' sugar
1 tbsp. butter, softened
2 to 3 tbsp. milk

In a mixing bowl, combine cake mix, pudding mixes, water, oil and eggs. Beat on low speed for 1 minute. Pour into a greased 9-inch tube pan.

Bake at 350°F for 60 to 70 minutes or until a toothpick inserted near the center comes out clean. Cool for 10 minutes before removing from pan to a wire rack to cool completely.

Combine the glaze ingredients; drizzle over cake.