Heat oven to 350 degrees. Put 6 foil liners in muffin tin. Spray with avocado oil spray, if desired.
In a small mixing bowl stir together the dry ingredients: almond flour, sweetener, Pumpkin Pie Spice, salt, Xanthan, and baking powder.
Add all the wet ingredients: melted butter, vanilla extract, plain pumpkin, and egg.
Stir all ingredients until thoroughly mixed and not lumpy. Do not beat.
Divide batter evenly into 6 previously prepared muffin liners. Place in oven and bake 18-20 minutes. (Tops of muffins will lose their glossiness when they are done.)