1 pkg. white cake mix
1 pkg. Royal pistachio instant pudding
1/2 c. oil
4 eggs
1 c. water
5 1/2 oz. Hershey's chocolate syrup

Combine cake mix, pudding, oil, eggs and water. Beat together. Pour 1/2 batter in a greased 9 x 13 inch pan. Add chocolate syrup to remaining batter. Pour on top of first half. DO NOT MARBLE. Bake in a 350 degree oven for 45 minutes or until cake tester comes out clean.