Prepare crust: Heat oven to 350°. Combine 1.25 cup crushed vanilla wafers, 1/3 cup powdered sugar, and 1/3 cup Hershey's cocoa. Stir in 0.25 cup melted butter. Press mixture onto bottom and 0.5 inch up side of 9-inch springform pan. Bake 8 minutes. Cool completely. After baking the crust, heat oven to 450°.