Preheat oven to 350°F. Spray two mini muffin tins with baking spray. Set aside.
Roll out pie dough on a baking mat or lightly floured surface. Using a 3-inch circle or flower-shaped cookie cutter, cut out 24 pieces. Gently press into the wells of the prepared muffin tins. Place in the refrigerator to chill.
Meanwhile, in a large mixing bowl, whisk the pumpkin puree, heavy cream, egg, sugars, pumpkin pie spice, cinnamon, salt, and vanilla.
Remove the tins from the refrigerator and fill each crust with 1½ tablespoons of filling (you can use a #40 cookie scoop). Tap the tins on the counter to create a smooth, even filling.
Place in the oven and bake for 18-22 minutes or until the crust begins to turn golden brown. Remove from the oven and cool in the tins for 15 minutes before transferring to a wire rack to cool completely.
Top with whipped cream and a sprinkle of cinnamon, if desired. Serve at room temperature or chilled.