Preheat oven to 400 F (200 C). Line baking sheet with parchment paper.
In a large bowl, combine flour, brown sugar, baking powder, spices, and salt.
Chop chilled butter into small cubes. Cut butter into dry ingredients using a fork (or two!) or a pastry blender / cutter until mixture is distributed throughout, and mixture forms coarse crumbs - it'll resemble gravel.
In a small bowl, whisk together ⅔ cup milk, molasses, and the egg.
Add the wet mixture to the bowl of dry ingredients, stir JUST until combined - mixture will be a little sticky.
Place dough onto a lightly floured work surface, sprinkling some flour on top. Gently knead for a few seconds, then gather dough up into a ball.
Press down to a disk that’s an even 1" thickness, cut into 6 wedges.
Transfer scones to the lined baking sheet, brush with the remaining milk.If you'd like, scatter coarse sugar over top of the unbaked scones. Bake for about 25 minutes or until golden brown.