1 cake mix
1 pkg. pistachio pudding mix
1 c. water
4 eggs
1/4 c. oil
1/4 c. chocolate syrup

Yellow or sour cream without pudding added.

Mix together first 5 ingredients. Take 1/3 cup of cake mix and add 1/4 cup chocolate syrup. Layer 2 mixes in bundt pan and swirl with knife.

FROSTING:

1/4 c. butter
1/4 c. milk
1 c. sugar
1 tsp. vanilla
1 sq. chocolate

Melt butter and chocolate. Add remaining ingredients. Boil for 1 minute. Beat until thick and of spreading consistency.