
Preheat oven to 350°F (177°C) and spray a 9x5 loaf pan with gluten-free cooking spray.
In a large bowl add pumpkin, baking soda, baking powder, and salt and mix to combine.
Add in the sugar, brown sugar, pure vanilla extract and mix until fully combined and smooth.
Add the eggs and the vegetable oil to the batter and mix until smooth.
Add in the gluten-free flour, xanthan gum (leave out if your flour already has it), pumpkin pie spice, and cinnamon and mix until fully combined and smooth. The batter will be thick.
Spoon the batter into the greased loaf pan. Bake for 50-60 minutes, or until a toothpick comes out clean. Allow the bread to cool for 5-10 minutes before slicing. I like to remove the loaf from the pan after 2 minutes and cool on a cooling rack or cutting board. Enjoy!