Grease a Bundt pan. Combine cake mix, pudding, milk, eggs, sour cream, and chocolate chips. Mix by hand until combined. Pour into Bundt pan. Bake at 350 degrees for at least 50 minutes. Cool 15 minutes before removing from pan. Frost with Sour Cream Frosting as follows:
Sour Cream Frosting: 2 1/2 c. powdered sugar, 3/4 c. cake flour, 1/2 tsp. salt, 1/3 c. butter, 2 tsp vanilla, 1/3 cup sour cream. Mix all ingredients well and if needed, add 1 - 2 T. more of sour cream. Spread on cake. Excellent!