Mix together 1/2 cup of the granulated sugar, the brown sugar, and the butter in a bowl with an electric mixer. Cream the butter and sugars for 2 minutes until the mixture is light and creamy.
Continuing to mix, add the egg and beat, then add the molasses.
On low speed, add the dry ingredients and mix until incorporated. Refrigerate the dough for 30 minutes.
Place the remaining 1/2 cup sugar into a small bowl. Roll the refrigerated cookie dough into 3/4 inch balls (using a small cookie scoop helps here) and roll into the sugar. Place on the baking sheet lined with parchment paper. Place the cookies 2 or 3 inches apart on the baking sheet. Flatten the rolled cookies slightly with 2 fingers when you place on the baking sheet.
Bake the cookies for about 12 minutes until set around the edges but still soft inside. let them cool for 5 minutes then remove from the baking sheet.