Line 2 baking sheets with parchment paper. Set aside.
In a stand mixer with a paddle attachment, beat the butter and sugars until smooth and fluffy. Add in egg, vanilla and molasses. Beat on medium speed until well incorporated.
In a smaller bowl, whisk together the spices, salt, white pepper, cocoa powder and flour. On low speed slowly, add in the flour mixture to the butter mixture. Mix about 20-30 seconds taking care not to overmix.
Chill dough for 1 hour.
Pre heat oven to 350 degrees.
With cold clean hands, roll the dough into 1 TBSP size balls. Roll in the sugar to throughly coat. Place on baking sheet 3- 4" apart. Bake for 9-11 minutes or until center is set. Cool on baking sheet for five minutes. Place on a wire rack to cool completely.