Adapted from The Joy of Cooking
2 sticks unsalted butter (1 cup)
1 cup white sugar
1 cup canned pumpkin
1 egg
1 tsp vanilla
2 cups AP flour
1 tsp baking powder
1/2 tsp baking soda
1/2 tsp table salt
1 tsp cinnamon
1/2 tsp allspice
1/2 tsp cardamom
Heat oven to 375. Cream the butter and sugar together. Add the pumpkin, egg, and vanilla, and mix well. In a separate bowl, sift together the flour, baking soda, baking powder, salt, and spices. Add the contents of the bowl to the wet ingredients and mix until smooth. Drop by tablespoons onto a greased or parchment-lined baking sheet. Bake for 15 minutes.