Add the shortening, light brown sugar, dark brown sugar, and eggs to a large mixing bowl.
Beat on medium-high speed until creamed, light and fluffy about 2 minutes.
Pour in the molasses.
Beat the molasses until well blended, about 2 minutes.
Fold in the dry ingredients and stir by hand until well incorporated.
Cover and chill for 2 hours in the fridge.
Preheat the oven to 350°F/176°C line a sheet pan with parchment paper and set aside.
Roll dough into small balls and then roll in the reserved 1/2 cup (100 grams) of white sugar.
Place on the parchment lined baking sheet and bake for 9-10 minutes until the cookies begin to crisp slightly in the outside, crack and you can see a soft center showing through the cracks.
Remove from the oven and allow to cool on the sheet pan for 5 minutes, then remove to a rack to cool.