Preheat oven to 350°. Cover baking sheets with parchment paper and set aside.
In a large mixing bowl, combine the brown sugar, softened butter, molasses, baking soda, egg, and all the spices. Using a hand or stand mixer, beat on medium speed until well combined.
Add the flour in small amounts, mixing until just combined. Dough will be stiff (if your dough is sticky, add more flour 2 Tbsp at a time until at desired thickness).
On a floured surface, roll out dough to about ¼". (If you like a softer, chewier cookie, you can go as thick as ½", but increase baking time by 2 minutes.) Cut desired shapes and place at least half an inch apart on the baking sheet.
Bake for 11 minutes, checking at 10 for firmness. Once done, remove from the baking sheet to cool on a wire rack. Decorate as desired!
