Preheat your oven to 400°F (200°C) and line a baking sheet with parchment paper.
In a large mixing bowl, whisk together the flour, brown sugar, baking powder, spices (cinnamon, nutmeg, ginger, cloves), and salt until combined.
Add the cold cubed butter into the dry ingredients. Use a pastry cutter or your fingertips to mix until the mixture resembles coarse crumbs.
In a separate bowl, whisk together the pumpkin puree, heavy cream, egg, and vanilla extract until smooth.
Pour the wet ingredients into the dry mixture and stir until just combined. If using, fold in the chopped nuts and chocolate chips gently.
Transfer the dough onto a floured surface and knead gently until it comes together (avoid over-kneading). Pat the dough into a round disc about 1-inch thick.
Using a sharp knife or pizza cutter, cut the disc into 8 wedges. Transfer the wedges to the prepared baking sheet, leaving space in between each scone.
Bake in the preheated oven for 15-20 minutes, or until golden brown on top and a toothpick inserted in the center comes out clean.
Remove from the oven and let them cool slightly on the baking sheet before transferring to a wire rack. Enjoy warm with butter or a drizzle of maple syrup!
Notes
Optional ingredients include walnuts or pecans and chocolate chips.