Preheat oven to 350°F. Butter two 6-inch round cake pans and line with parchment paper. Set aside.
In a medium bowl, whisk together flour, baking powder, baking soda, pumpkin pie spice, and ground cinnamon. Set aside.
In the bowl of a stand mixer fitted with a paddle attachment, cream together coconut oil and pumpkin puree. Add sugar, salt and eggs. Mix until smooth.
Add half of dry flour mixture. Mix on low speed until almost combined. Add milk. Mix on slow speed and then add remaining dry flour mixture. Mix until there are no longer any dry streaks of flour. Scrape down bowl as needed to ensure thorough mixing.
Divide cake batter between the two prepared cake pans. Level batter using a mini offset spatula. Bake for 35-40 minutes until toothpick inserted in center of cake comes out clean. Allow to cool in pan for 5 minutes before unmolding. Allow cake to cool to room temperature on wire rack.