Preheat your oven to 350°F (175°C).
In a bowl, whisk together flour, ginger, cinnamon, nutmeg, baking soda, and salt.
In a separate bowl, cream the softened butter and brown sugar until light and fluffy.
Beat in the egg, molasses, and vanilla extract until well combined.
Gradually add the dry ingredients to the wet mixture, mixing until a dough forms.
Roll the dough into balls about 1 inch in diameter and place them on a baking sheet lined with parchment paper.
Flatten each ball slightly with the palm of your hand.
Bake in the preheated oven for 10-12 minutes, until the edges are firm.
Remove from the oven and allow them to cool on the baking sheet for 5 minutes.
Transfer cookies to a wire rack to cool completely.