In a medium bowl, whisk together the flour, baking soda, and spices.
Cream together butter and sugar, in another medium bowl for 5 minutes on medium speed.
Add the egg. Beat for 1 minute. Scrap down the sides of the bowl with a spatula.
Add the molasses and beat until combined.
Sprinkle in the flour. Beat on low speed for 2 minutes more.
Refrigerate the dough, covered in plastic for 1 hour.
Preheat the oven to 350 F.
Line a baking sheet with parchment paper.
Roll the Ginger Molasses Cookie dough into 15 rounds.
Place granulated sugar into a medium bowl.
Roll the cookies to cover in sugar. Then, place on the baking sheet.
Bake cookies for 10-12 minutes.
Remove from the oven and allow to cool on the tray.