In a large mixing bowl whisk together the flour, ginger, cinnamon, baking soda, salt and nutmeg then set aside.
Add the butter and brown sugar to the bowl of a stand mixer and beat until light and fluffy, scraping down the sides of the bowl as needed.
Add the molasses, egg and vanilla, beating well to combine. Gradually beat in the flour mixture on low speed until well combined.
Shape the dough into a disc then wrap in plastic wrap and refrigerate for at least 4 hours, up to overnight.
Heat oven to 350ºF (180ºC).
Lightly flour a clean work surface then roll the dough out so it’s ¼-inch thick. Use a 5-inch cookie cutter to cut gingerbread men. Pull together the dough scraps and reroll out to cut more gingerbread men.
Arrange 1-inch apart on a baking sheet. Bake until they just begin to brown, about 8 to 10 minutes. Remove to wire racks to cool.
Cool completely before decorating as desired. Store in an airtight container.