1 box Duncan Hines marble cake mix
4 eggs
1/2 pt. sour cream
1/4 c. milk
1/2 c. oil
1 sm. pkg. instant vanilla pudding
1/2 pkg. chocolate chips
1 tsp. vanilla

Mix all but chocolate chips and vanilla by electric beater. Add chocolate chips and vanilla, beat by hand. Pour 3/4 batter into greased bundt tube pan. Add chocolate chips to rest of batter. Spoon and marbelize. Bake 1 hour at 350 degrees.