1 package devil's food chocolate cake mix
1 small box instant chocolate pudding mix
1 carton (8 oz) sour cream
1/2 cup water
1/2 cup vegetable oil
1 package (12 ounce) chocolate chips
Preheat oven to 350 degrees. In large mixing bowl, combine cake mix, pudding mix, sour cream, eggs, water, and oil; beat until blended, about 2 minutes.
Stir in chocolate chips. Pour batter into a greased bundt pan or greased 13x9x2 pan. Bake 1 hour. Remove from oven; cool. Sprinkle with powdered sugar.