In a large bowl, combine sour cream, dry instant pudding mix, cake mix, water, oil, and eggs with an electric mixer on medium speed for about -2 minutes, or until thick and smooth.
Let cake stand for minutesInvert on a cooling rack and remove cake from pan.
Bake for minutes 1 hour, or until a toothpick inserted in the center of the cake comes out clean.
Preheat oven to degrees FSpray a 12-cup Bundt pan with cooking spray and set aside.
Use a wooden spoon or a spatula to gently fold in the chocolate chips.
Pour batter into prepared Bundt pan.
Once cake is completely cool, dust with powdered sugar.
Per Serving (excluding unknown items): 199 Calories; 14g Fat (58.2% calories from fat); 4g Protein; 19g Carbohydrate; 2g Dietary Fiber; 79mg Cholesterol; 37mg Sodium. Exchanges: 1/2 Lean Meat; 0 Non-Fat Milk; 2 1/2 Fat; 1 Other Carbohydrates.