Preparation

• Preheat oven to 325°. Place a greased 9-in. springform pan on a double thickness of heavy-duty foil (about 18 in. square). Securely wrap foil around pan.
• In a small bowl, combine the cookie crumbs, butter and sugar. Press onto the bottom of prepared pan.
• In a large bowl, beat cream cheese and sugar until smooth. Beat in sour cream, buttermilk, cocoa and vanilla until smooth. Add eggs; beat on low speed just until blended. Stir in food coloring. Pour over crust. Place springform pan in a large baking pan; add 1 in. hot water to larger pan.
• Bake until center is just set and top appears dull, 60-70 minutes. Remove springform pan from water bath. Cool on a wire rack for 10 minutes. Carefully run a knife around inside edge of pan to loosen; cool 1 hour longer. Refrigerate overnight, covering when completely cooled. Remove side of pan.
• For frosting, in a small bowl, beat cream cheese and butter until fluffy. Add confectioners’ sugar and vanilla; beat until smooth. Frost top of cheesecake. Refrigerate until serving.