Preheat oven to 350 degrees F. Grease an 8×8 square pan.
In a medium bowl, add the flour, cinnamon, pumpkin spice, baking powder, baking soda, cream of tartar, and salt. Mix until well combined.
In a large bowl, add the avocado oil, applesauce, organic cane sugar, brown sugar, pumpkin puree, and vanilla extract. Whisk until well combined.
Add the dry to the wet ingredients. Stir with a spatula until combined. Careful not to overmix. The batter will be thick.
Pour batter into the greased pan. 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 15-20 minutes, or until a toothpick comes out clean. Let it cool completely. Slice and enjoy! Store leftovers in an airtight container on the counter for up to 3 days.