In a large mixing bowl whisk together the pumpkin, brown sugar and egg until smooth and fully combined.
Add the oats, pumpkin spice, baking soda, baking powder and salt. Stir until the mixture is evenly mixed, then fold in the dark chocolate chips.
Use a cookie scoop to drop golf ball size portions of dough onto a greased or parchment lined baking sheet. Lightly flatten each cookie with the bottom of a class or measuring cup.
Bake at 350 degrees F for 12-15 minutes, or until the bottoms are lightly golden. Let the cookies cool on the baking sheet for at least 15 minutes before transferring to a cooling rack.
Notes
You can use any add in you prefer in place of or in addition to the chocolate chips. Some suggestions include chopped pecans, walnuts, cashews or almonds. Dried cranberries, butterscotch or white chocolate chips also work well.