Preheat the oven to 350 degrees. Line two large cookie sheets with parchment or silicone mats.

In a large bowl stir together the flour, baking powder, baking soda, cinnamon, nutmeg, allspice, and salt. Set aside.

Cream together the butter, sugar, and pumpkin in the bowl of your electric mixer. Add the egg and vanilla. Slowly stir in the dry ingredients until fully combined.

Pipe or spoon your dough onto your prepared sheets. Bake for 15 minutes, or lightly browned around the edges.

While you cookies are cooling whisk together the powdered sugar, 2 tablespoons melted butter, and coffee creamer until you get the desired consistency. Spread over your cooled cookies and enjoy.