Preheat the oven to 375°F and line a muffin pan with muffin cup liners or grease lightly with baking spray.
In a large bowl, whisk together the wet ingredients: canola oil, granulated sugar, brown sugar, vanilla extract, eggs, and pumpkin puree.
In a separate bowl, combine the dry ingredients: gluten-free flour, ground cinnamon, ground cloves, ground ginger, ground nutmeg, allspice, baking soda, and salt.
Gradually mix the dry ingredients with the wet ingredients, mixing until the ingredients are incorporated and the dry ingredients are moistened.
Spoon the batter evenly among the 12 muffin liners, about ⅔ of the way full.
Bake for 24 to 26 minutes or until a toothpick inserted into the center of a muffin comes out clean.
Remove the pan from the oven and let the muffins cool in the pan for about 5 minutes before transferring them to a wire rack to cool completely.
Notes
Use pure pumpkin, not pumpkin pie mix. If using homemade pumpkin puree, squeeze out the extra liquid first.Do not overmix. Stir until just combined. Gluten free batter gets gummy if overworked.Fill liners two-thirds full. The batter rises less than wheat flour muffins.Add ½ cup gluten free chocolate chips for a chocolate chip version.Store at room temperature for a few days. Freeze individually wrapped for up to 2 months.