1 pkg. Deluxe yellow cake mix
1 pkg. instant pistachio pudding
1 c. sour cream
4 eggs
1/2 c. oil
1/2 c. chocolate syrup

Mix the cake mix, eggs, pudding, and oil well and beat until smooth. Add the sour cream and beat with electric mixer 5 minutes. Pour 2/3 of the batter into a well greased and floured tube or Bundt pan. Mix the remaining 1/3 batter with the chocolate syrup and pour over the green batter in pan.

With a knife swirl the chocolate mixture into the other mixture. Bake in preheated 350 degrees oven for 50-60 minutes or until done. Leave in pan 10-15 minutes before removing. Sprinkle powdered sugar on top.