Preheat oven to 350°. Line two baking sheets with parchment paper.
In the bowl of a stand mixer fitted with a paddle attachment, cream butter and brown sugar together. Add molasses, egg, and vanilla, mixing until thoroughly combined, stopping to scrape the bowl as needed.
To a large bowl, add flour, cinnamon, allspice, nutmeg, black pepper, cloves, ginger, baking soda, and salt. Whisk to combine.
With the mixer on low, gradually add the flour mixture to the wet ingredients, mixing until thoroughly combined.
Using a 1 tablespoon cookie scoop, drop dough onto parchment-lined baking sheets about 1 inch apart.
Bake for 12-15 minutes, checking at 10 minutes, or until cookies are cracking slightly and firm to the touch.
Let cool for 5 minutes.
To a medium bowl, add confectioners' sugar. Toss each cooled cookie in the confectioners' sugar until completely coated. Set on a serving platter. Enjoy!