Mix together the cake mix and the dry pudding. Add the eggs, oil and water and mix well. Add the sour cream and mix all together with a spoon. Add the chocolate chips and mix well.
Pour batter into the Bundt pan and bake at 350 degrees for 50 minutes. Cool and remove from the pan.
Sprinkle with powdered sugar or make a glaze with the powdered sugar and milk and drizzle over the top.