Chocolate Marbled Pumpkin Cheesecake

To Make Graham Cracker Crust: Butter 10-inch springform pan. In medium bowl, combine graham cracker crumbs, 2 tablespoons granulated sugar, and butter. Mix well. Press on bottom only of pan. Sprinkle evenly with 1 cup chocolate chips. Set aside.

To Make Pumpkin Cheesecake: Preheat oven to 325 degrees F. In small heavy saucepan melt 1 cup chocolate chips over low heat, stirring constantly, until smooth. Set aside. In large mixer bowl, beat cream cheese, 1 cup granulated sugar, and brown sugar at medium speed of electric mixer until smooth. Beat in pumpkin. Beat in eggs and evaporated milk until blended.

Sift in cornstarch, cinnamon, and nutmeg. Beat just until mixed. Stir 1 cup pumpkin mixture into melted chocolate. Mix well and set aside. Pour remaining pumpkin mixture into crust. Spoon chocolate mixture on top in small mounds. Swirl with a knife. Place pan on baking sheet. Bake for 60 minutes until edge of filling is set (center will still jiggle). Let cheesecake stand in oven with door closed for 30 minutes. Remove from oven. Cool on rack to room temperature, about 3 hours. Cover and refrigerate for several hours before serving.