1. Preheat oven to 350° F. For the Crust, mix all ingredients in medium bowl. Press evenly into bottom of 9-inch springform pan. Set aside.
2. For the Filling, beat cream cheese and brown sugar in large bowl with electric mixer on medium speed until fluffy. Add eggs, one at a time, beating on low speed after each addition just until blended. Add pumpkin, flour, vanilla and pumpkin pie spice; beat until smooth. Pour into crust.
3. Bake 50 minutes or until top is lightly browned and center is almost set. Turn off oven; let cheesecake stand in oven 1 hour. Remove from oven. Run small knife or metal spatula around rim of pan to loosen cheesecake. Cool in pan on wire rack.
4. Refrigerate 4 hours or overnight. Garnish with whipped cream and sprinkle with additional pumpkin pie spice, if desired.