Preheat oven to 350F; parchment-line 8x8 pan.

Whisk flour, cocoa, and sugar in bowl.

Stir in pumpkin puree, coconut oil, pumpkin pie spice, and vanilla into thick batter.

Spread batter in pan; smooth top.

Bake 30 to 32 minutes until center sets.

Cool fully; chill briefly before cutting squares.