Preheat your oven to 400°F (200°C). Line a baking sheet with parchment paper to prevent sticking.
In a large mixing bowl, whisk together the all-purpose flour, brown sugar, baking powder, ground ginger, cinnamon, nutmeg, allspice, and salt until well blended and no lumps remain.
Incorporate the cold, cubed butter into the flour mixture. Using a pastry cutter or your fingers, work the butter into the dry ingredients until the mixture resembles coarse crumbs, with small pea-sized pieces of butter still visible.
In a separate bowl, whisk together the molasses, heavy cream, and egg until smooth and fully combined.
Gradually pour the molasses mixture into the flour and butter mixture, using a spatula or wooden spoon to gently fold the ingredients together until just combined. If desired, fold in the chopped crystallized ginger for an extra pop of flavor.
Turn the dough out onto a lightly floured surface. With clean hands, gently knead the dough just a few times until it holds together without being overly worked. Form the dough into a circle that is about 1-inch thick.
Using a sharp knife, cut the dough into 8 equal wedges, resembling a pizza shape. Carefully transfer each scone to the lined baking sheet, ensuring there is a small space between each one to allow for spreading during baking.
Bake the scones in the preheated oven for 15-18 minutes, or until they are lightly golden on the edges and a toothpick inserted into the center comes out clean.
While the scones are baking, prepare the glaze by mixing the powdered sugar with enough milk to achieve a smooth, drizzle-able consistency. Adjust the amount of milk to reach your preferred thickness.
Once the scones are golden and baked through, remove them from the oven and allow them to cool on the baking sheet for a few minutes. Drizzle the prepared glaze generously over the warm scones.
Serve the scones warm, and enjoy them as a delightful holiday treat that will bring joy to your Christmas celebration!
Notes
To enhance the festive look, sprinkle extra powdered sugar and garnish with edible gold or silver stars.