Preheat oven to 325°F (160°C). Line a 12-cup muffin tin with paper liners.
Mix crumbs and melted butter; press 1 tbsp into each liner to form crusts.
Beat cream cheese and sugar until smooth. Add pumpkin, egg, vanilla, spice, and salt; mix until combined.
Spoon filling over crusts, filling about 3/4 full. Tap pan to remove air bubbles.
Bake 18–22 minutes until centers are set but slightly jiggly. Cool 15 minutes, then chill at least 1 hour.
Top with whipped cream and a dusting of cinnamon before serving.