Preheat oven to 400°F. Line a baking sheet with parchment paper and set aside.
In a large bowl, whisk together the flour, brown sugar, baking powder, soda, salt, cinnamon, ginger, cloves, and nutmeg. Grate the cold butter on the large holes of a box grater or use a pastry cutter to cut the butter into the flour mixture until it resembles small peas or crumbs.
2 cups all-purpose flour, 1/3 cup brown sugar, 1 teaspoon baking powder, 1/2 teaspoon baking soda, 1/2 teaspoon salt, 1 teaspoon ground cinnamon, 3/4 teaspoon ground ginger, 3/4 teaspoon ground cloves, 1/2 teaspoon ground nutmeg, 1/2 cup salted butter
In a separate bowl, whisk together the pumpkin puree, molasses, cream, vanilla and egg. Stir pumpkin mixture into the flour mixture just until a soft dough starts to come together. Transfer the dough onto a piece of parchment paper or a lightly floured surface and knead three or four times, just until it all comes together.
1/2 cup pumpkin puree, 1 Tablespoon molasses, 3 Tablespoons heavy cream, 1 large egg, 2 teaspoons pure vanilla extract
Pat the dough into a 10x7-inch rectangle, then use a sharp knife or bench scraper to cut the rectangle in half lengthwise. Then make 4 crosswise cuts to create 8 rectangles. Cut each rectangle in half on the diagonal for 16 triangular-shaped scones.
Transfer the scones to the prepared baking sheet, then bake for 11 to 14 minutes until done. Transfer to a wire rack to cool completely.