Preheat oven to 325 degrees (F). Line 12 muffin tins with paper liners. Place 1 Oreo in the bottom of each muffin tin. Set aside.

In large bowl, whip cream cheese and sugar together until smooth. Stir in vanilla, pumpkin, egg, cinnamon, nutmeg, flour and salt until combined. Scrape sides of bowl and whip mixture until completely smooth. Spoon mixture evenly over Oreos. Bake 20-25 minutes or until cheesecakes have set. Remove from oven to cool.

Once cheesecakes are cool enough to handle, remove from muffin tin. Remove paper wrappers. Microwave chocolate chips until smooth and completely melted. Spoon chocolate into a piping bag with a small round tip. Pipe melted chocolate in concentric circles on top of cheesecakes. Drag the end of a toothpick through the chocolate to create a spider’s web look, starting in the center and dragging outward. Repeat with remaining cheesecakes. Refrigerate until ready to serve.