1 butter flavor yellow cake mix
1 small box instant vanilla pudding
3/4 c. oil
4 eggs
1 tbsp. vanilla
1 (8 oz.) container sour cream
5 oz. chocolate syrup
1 (6 oz.) pkg. milk chocolate chips
1/2 c. melted butter

Mix cake mix, pudding, oil, eggs, vanilla, sour cream and butter. Divide batter in half. Add chocolate chips to one bowl and chocolate syrup swirled in the other. Pour bowl with chocolate syrup in bottom of greased and floured pound or bundt cake pan. Then pour bowl with chocolate chip batter on top.

Bake at 325°F for 1 hour.

Good plain or with chocolate frosting.