Preheat the oven to 350F and line a cookie sheet with parchment.
In the mixing bowl of your stand mixer, cream together the butter and brown sugar until smooth and fluffy. Add the eggs, whip for about 45 seconds, then add the pumpkin puree and vanilla. Mix until combined and smooth.
In a separate bowl mix together the dry ingredients (flour, baking soda, baking powder, salt, cinnamon, ginger, nutmeg and allspice).
Slowly whisk the dry mix into the wet mix a 1/4 cup at a time until finished.
Cakie mix is a little sticky and can seem difficult to work with – but I just scoop the batter using a small batter scoop or a tablespoon and push off with my finger onto a parchment lined baking sheet and bake them free form (you will not get perfect circles). If you want to add the sugar dusting, add it here on top before they go into the oven, just a pinch on each one.
If you are making the glaze, whisk together all ingredients until smooth and silky. You can adjust the consistency by adding more milk if it's too thick or more powdered sugar if its too thin.
Bake for 15 minutes, let cool and serve as is. If you’re glazing them, drizzle on once fully cooled.