Preheat over to 350°F/180°C.
In a large bowl, mix together the pumpkin puree, peanut butter, and maple syrup.
In another bowl, mix together the oats, oat flour, salt, cinnamon, and pumpkin pie spice.
Add the wet and dry ingredients to the same bowl along with the chocolate chips and mix well.
Prepare a 9x9inch/23x23cm square baking pan by rubbing it with coconut oil or lining it with parchment paper.
Press the mixture into the pan and spread evenly. Press down firmly into the pan.
Add some extra chocolate chips on top by pressing them into the bars so they don´t fall off afterwards. Sprinkle the coconut sugar or brown sugar on top. Place in the oven and bake for 25minutes until slightly browned on the top.
Feel free to cut and eat while warm, but I think they taste even better the next day! Store at room temperature in an air-tight container to up to 4 days.
These bars freeze very well! Cut the bars first and put in a freezer-safe container or ziplock bag. To defrost, pop a bar into the microwave for 15 seconds until warmed through, or allow to sit at room temperature for about 45 minutes.