Preheat the oven to 350 degrees F, and grease an 8-inch square baking dish or a 9-inch round cake pan.
In a small bowl, stir together the almond flour, coconut flour, cinnamon, pumpkin pie spice, baking soda, and salt.
In a separate medium to large bowl, whisk the eggs and then stir in the pumpkin, maple syrup, and melted oil.
Add the dry ingredients to the wet ingredients, and stir to combine. Stir in the optional half cup of chocolate chips. (Alternately, you can use 1/4 cup of chips a topping. Even 2 tablespoons is enough to add a hint of chocolate on top for those who enjoy but want to keep added sugar to a minimum.)
Pour into the prepared pan (sprinkling with chips if desired), and bake for 25 minutes, give or take a few minutes depending on oven and precise dimensions of the chosen pan, or until just cooked through the center.