Preheat your oven to 350 degrees F.
In a mixing bowl combine pumpkin, eggs and vanilla until well combined. In a separate bowl, combine flour, oats, sugars, baking powder, baking soda, spices and any mix ins. Combine wet and dry ingredients until mixed. The cookie dough will be very thick.
Drop by spoonfuls onto cookie sheets about 2" apart. If desired, flatten the cookie dough slightly with a fork (it will not spread much, and will stay in a shape similar to what you put into the oven).
Bake for 12-15 minutes until lightly browned. It's best to remove them from the cookie sheet quickly after baking to prevent them from sticking to the sheet.
Makes approx 36 cookies.