1 (18 oz.) chocolate cake mix
1 (3 oz.) pkg. instant chocolate pudding mix
1 c. sour cream
1/2 c. vegetable oil
1/4 c. water
4 eggs
1 1/2 c. chocolate chips
1/2 c. chopped nuts (optional)

Mix first 6 ingredients until smooth. Add chocolate chips and nuts. Bake 1 hour at 350 degrees in a greased Bundt pan.