Preheat your oven to 350°F (175°C) and line an 8x8 inch baking pan with parchment paper.
In a large mixing bowl, combine the pumpkin puree, almond butter, maple syrup, and vanilla extract. Mix until well combined.
In a separate bowl, whisk together the oat flour, protein powder, baking powder, cinnamon, nutmeg, and salt.
Gradually add the dry ingredients to the wet ingredients, mixing until a smooth batter forms. Fold in the chocolate chips if using.
Pour the batter into the prepared baking pan and spread it evenly.
Bake in the preheated oven for 25-30 minutes or until the edges are golden brown and a toothpick inserted into the center comes out clean.
Remove from the oven and allow the blondies to cool in the pan for 10-15 minutes before transferring them to a wire rack to cool completely.
Once cooled, cut into squares and enjoy!