Preheat the oven to 350 degrees F. Prepare an 8.5 x 4.5 loaf pan by lightly greasing the bottom and sides, or by lining the sides with parchment paper.
In a large mixing bowl, combine the oat flour, almond flour, ground flaxseeds, tapioca starch, baking powder, salt, pumpkin pie spice, and cinnamon.
1 ½ cups (153g) oat flour, ½ cup (42g) almond flour, ½ cup (53g) ground flaxseeds , ¼ cup (30g) tapioca starch/flour, 2 tsp. baking powder , ½ tsp. fine sea salt, 2 tsp. pumpkin pie spice, 1 tsp. ground cinnamon
In a separate small bowl, whisk together the pumpkin, milk, maple syrup, coconut oil, eggs, and vanilla.
1 cup pumpkin puree, ⅓ cup milk of choice, ½ cup pure maple syrup, ¼ cup coconut oil, melted, 2 eggs, 2 tsp. pure vanilla extract
Add the wet ingredients to the dry ingredients and mix until just combined (do not overmix). If adding the chocolate chips, fold them in and reserve a few to sprinkle on top of the batter before baking.
¾ cup semi-sweet chocolate chips
Pour the batter into prepared loaf pan and evenly spread in pan. Sprinkle with remaining chocolate chips. Let batter rest in the pan for 15 minutes before putting in the oven (see notes).
Bake for 50-55 minutes, or until a toothpick inserted into the center comes out clean (see notes).
Allow bread to cool slightly and move to a cooling rack or cutting board to fully cool. Slice and enjoy!