Preheat your oven to 400°F (200°C) and line a baking sheet with parchment paper.
In a large bowl, whisk together the flour, brown sugar, baking powder, pumpkin pie spice, and salt.
Add the cold butter cubes and cut into the dry ingredients using a pastry cutter or fork until the mixture resembles coarse crumbs.
In a separate bowl, mix together the pumpkin puree, heavy cream, and vanilla extract.
Add the wet ingredients to the dry ingredients and mix until just combined.
Transfer the dough to a floured surface and shape it into a thick disc. Cut into 8 wedges.
Place the scones onto the prepared baking sheet and bake for 18-20 minutes, or until golden brown.
Remove from oven and let cool on a wire rack before serving. Ad frosting if desired.