In a large bowl, cream together the butter and brown sugar with a hand mixer or electric mixer on medium speed until light and fluffy.
1 cup brown sugar, ¾ cup unsalted butter
Mix in molasses and the egg until well incorporated. Add the cinnamon, nutmeg, ginger, salt, and baking soda to the mixing bowl and mix well.
½ cup molasses, 1 egg, 1 teaspoon cinnamon, ⅛ teaspoon nutmeg, 1 teaspoon ground ginger, ½ teaspoon salt, 2 teaspoon baking soda
Gradually add in the flour mixture on low speed, just until combined. Cover and chill for at least 2 hours.
2 ¾ cups all-purpose flour
Preheat at an oven temperature of 350F.
Roll dough into 1 ½" balls and roll them in the granulated sugar until coated. Place dough balls 2" apart on an ungreased cookie sheet pan, lined with parchment paper. Bake cookies for 11 minutes.
½ cup granulated sugar
Let the cookies cool for a few minutes on the cookie sheet before transferring them to a wire cooling rack to cool completely. Store in an airtight container, cookie jar, or freezer bag.