Preheat oven to 350 degrees F. Grease an 8×8 square pan.
In the bowl of your stand mixer, add the coconut oil, applesauce, sugar, and brown sugar. With the paddle attachment, mix until well combined, about 1 minute.
Add the pumpkin and vanilla. Mix until well combined. Scrape down the sides of the bowl.
Add the flour, cinnamon, pumpkin spice, baking powder, baking soda, cream of tartar, and salt. Mix until just combined. Try not to over mix.
Place batter into the greased pan. It will be thick. Spread the batter evenly in the pan. Mix together the cinnamon sugar topping in a small bowl. Sprinkle evenly over the top of the batter. Bake for 16-19 minutes, or until a toothpick comes out clean. Let it cool completely on top of a cooling rack. Slice and enjoy!