1. Preheat oven to 350 degrees F if using a 9-inch silver springform pan (or to 325 degrees F if using a dark nonstick 9-inch springform pan). Finely crush 30 of the cookies. Coarsely chop remaining 15 cookies; set aside. Mix crushed cookies with butter. Press firmly onto bottom and 2 inches up side of pan; set aside.
2. Beat cream cheese and sugar in large bowl with electric mixer on medium speed until well blended. Add sour cream and vanilla; mix well. Add eggs, 1 at a time, mixing on low speed after each addition just until blended. Gently stir in chopped cookies. Spread into prepared crust.
3. Bake 55 minutes to 1 hour or until set. (If necessary to prevent top from overbrowning, tent with foil during last 15 to 20 minutes of baking time.) Cool completely on wire rack.
4. Refrigerate at least 4 hours. Run knife or metal spatula around side of pan to loosen cake; remove side of pan before serving.

Yield: 16 servings