Preheat oven to 350°
Prepare 2 baking sheets by lining with parchment paper.
In a medium bowl, whisk together flour, ginger, cinnamon, baking soda and salt. Set aside.
Using a stand mixer with the paddle attachment, begin creaming the butter and granulated sugar until light and fluffy (2 - 4 minutes on medium speed). Scrape the bowl as needed. (note: a hand mixer may also be used)
Add the egg and molasses to the bowl and mix on medium speed until incorporated. Scrape the bowl as needed.
Add the flour mixture and mix on low speed until combined.
Wrap in plastic and place in refrigerator for 20 minutes.
Take 1 ½ tablespoon of the dough, roll into a ball and roll in the coating sugar.
Place onto parchment-lined baking sheets leaving approximately 2 inches of space between each cookie.
Using your palm or the bottom of a round drinking glass, flatten the cookie slightly.
Bake cookies for 8 - 10 minutes.
Let cookies cool on the baking sheets for 5 to 10 minutes, then transfer them to a wire rack to cool completely.