In a large bowl, cream together the butter and brown sugar for 2 minutes.
Add the egg and milk and beat to combine. Add the molasses and beat until fully
combined. Set aside.
In a medium-sized bowl, stir together the flour, baking soda, cinnamon, ginger and salt.
Beat the dry ingredients into the wet ingredients until no dry patches remain. Cover with plastic wrap and place dough in the fridge for 1 hour or overnight.
Preheat oven to 350 degrees F. Line two baking trays with parchment paper or silicone baking mats.
Use a cookie scoop to portion the dough into even 1 1/2 Tablespoon balls of dough.
Roll the dough in the white sugar, and then in the powdered sugar.
Place the sugar-coated balls on the prepared baking trays, at least 2” apart.
Bake cookies for 10-12 minutes until spread and well browned.
Allow to cool for 2 minutes on baking sheets before attempting to move to a cooling rack.