Chocolate Cheesecake
["1 1/2 c. vanilla wafer crumbs", "1/2 c. powdered sugar", "1/3 c. Hershey's cocoa", "1/3 c. butter or margarine, melted"]
["Combine all ingredients in a bowl and press firmly on the bottom of a 9-inch spring form pan."]
["vanilla wafer crumbs", "powdered sugar", "cocoa", "butter"]