Preheat oven to 350°F (175°C) and grease an 8x8 inch square baking pan.

In a large mixing bowl, whisk together the pumpkin puree, eggs, maple syrup, melted coconut oil, and vanilla extract until homogenous.

In a separate medium bowl, sift together the oat flour, pumpkin pie spice, baking soda, and sea salt.

Incorporate the dry ingredients into the wet mixture using a spatula, folding until no dry streaks remain.

Gently fold in the dark chocolate chips.

Transfer the batter into the prepared baking pan and smooth the surface with a spatula.

Bake for 25 to 28 minutes, or until a toothpick inserted into the center comes out clean.

Remove from oven and let the bars cool completely in the pan on a wire rack for at least 30 minutes before slicing into 12 bars.