Preheat oven to 350° F. In a large bowl, beat 2 cups butter with an electric mixer on medium speed until light and fluffy. Add granulated sugar, baking powder, baking soda, salt, cinnamon and nutmeg. Beat until combined, scraping bowl occasionally. Add eggs and 2 tsp of vanilla, beat until combined. Beat in pumpkin. Add the flour slowly until combined. Dough will be very wet.