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 cookie crumbs and butter. Press onto bottom and 1 in. up the side of prepared pan. Place pan on a baking sheet. Bake until set, 12-14 minutes. Cool on a wire rack. , In a large bowl, beat cream cheese and sugar until smooth. Beat in sour cream, flour and extracts. Add eggs; beat on low speed just until combined. Fold in chips. Pour into crust. (Pan will be full.) Place springform pan in a large baking pan; add 1 in. hot water to larger pan., Bake at 325° until center is just set and top appears dull, 1-1/4 to 1-1/2 hours. Remove springform pan from water bath. Cool on a wire rack 10 minutes. Carefully run a knife around edge of pan to loosen; cool 1 hour longer. Refrigerate overnight. Remove side of pan., For topping, in a large bowl, beat cream cheese and sugar until smooth. Stir one-fourth of the whipped topping into mixture; fold in remaining whipped topping. Spread or pipe onto cheesecake. Garnish with crushed candy canes and shaved chocolate if desired.