Preheat oven to 400°F, and line a baking sheet with parchment paper; set aside.
Whisk all of the dry ingredients together in a large bowl: flour, baking powder, cinnamon, pumpkin pie spice, and salt. Grate frozen butter using a box grater into the flour mixture and combine with a pastry cutter or two forks until the mixture resembles coarse crumbs.
In another bowl, whisk together the remaining ingredients: heavy cream, an egg, pumpkin puree, and brown sugar. Drizzle over flour/butter mixture and mix until just combined.
Dump dough onto a floured surface and shape into an 8 inch disk. Cut 8 equal pieces and place scone at least 2 inches apart onto baking sheet.
Brush with extra heavy cream and sprinkle with extra sugar if desired. Baking for 20-25 minutes or until lightly browned. Remove from oven and let cool completely. Drizzle optional white chocolate and butterscotch on top and enjoy!