In a medium bowl, whisk together whole wheat flour, baking soda, salt, ginger, cinnamon, cloves, and nutmeg.
In a large bowl, cream butter and dark brown sugar until light and fluffy. Beat in the egg, molasses, and vanilla extract.
Gradually add the dry ingredients to the wet ingredients, mixing until a soft dough forms.
Divide the dough into two disks, wrap them in plastic, and refrigerate for at least 1 hour.