Preheat the oven to 350° degrees F. Grease two large cookie sheets or line with parchment paper. Set aside.
In a large bowl with an electric mixer, mix the butter, sugars, pumpkin and egg. Mix on low speed until combined.
In a separate large bowl, whisk together flour, baking soda, baking powder, cinnamon, and nutmeg. Slowly add dry ingredients into the wet mixture a little bit at a time and mix until just combined. Stir in chocolate chips.
Drop the cookies onto the baking sheet with a small cookie scoop (about 2 Tablespoons worth of dough per cookie.) Bake for 10 to 12 minutes or until set. Don't over-bake. Cool on a cooling rack. When cooled frost with frosting.