1/2 C butter (1 stick)
1 cup sugar 
1 tsp vanilla  
1/4 C cocoa powder 
1 Tbsp red food coloring 
1 tsp vinegar 
2 eggs 
3/4 cup flour 

Cheesecake Layer: 

1 8oz package cream cheese, softened
1/4 cup sugar 
1 egg 
1/8 tsp vanilla