1 box Duncan Hines butter fudge cake mix
1 pkg. chocolate instant pudding
1 c. (8 oz.) sour cream
1 pkg. semi-sweet chocolate chips
1/2 c. vegetable oil
8 oz. chopped walnuts

Follow instructions in Duncan Hines package, but add sour cream instead of butter, oil, and pudding. Mix thoroughly until completely blended. Place in well-greased bundt cake pan. Add walnuts and chocolate chips. Mix in well.

Bake at 325 degrees and check after 40 minutes by inserting a knife in cake. If it comes out clean, then it is ready. It not, leave for 5-10 minutes more in oven.