1 pkg. Duncan Hines yellow cake mix
1 pkg. vanilla pudding
4 eggs
2/3 c. Wesson oil
1 c. sour cream
1 c. Hershey chocolate syrup
1 c. chocolate chips
Optional - 1/2 c. chopped pecans or walnuts

Mix first 5 ingredients and divide into 2 parts. To one part add syrup and chocolate chips; stir. Layer in greased Bundt pan with white batter, then chocolate, then nuts if wanted, then another layer of white and chocolate batter. Bake at 325 degrees for 1 hour and 10 minutes.