Preheat oven to 350 F and line 2 baking sheets with parchment paper.
Whisk together the flours, starch, salt, baking soda, and pumpkin pie spice and set aside.
In a large bowl, whisk together the butter/oil and coconut sugar until well combined. Add the egg yolk, pumpkin, and vanilla and whisk until smooth.
Add the dry ingredients to the wet and mix with a spatula until just combined.
Fold in the chocolate chips (add more as desired!).
Scoop tablespoon sized dollops of batter onto the cookie sheets about 2 inches apart. Bake one sheet at a time on the middle rack for 10-12 minutes. Cookies should seem not quite done, but feel set.
When you remove the cookies, smack the tray on the counter one time to help release the air for a better cookie texture.
Let cool on the cookie sheet for 10 minutes before removing to a wire rack to finish cooling. Enjoy!