Place 2 layers of napkins in a small bowl. Add pumpkin puree and spread out with a silicone spatula or spoon. Press another 2 layers of napkins gently onto the top. See cooking tips above for rationale.
In a large mixing bowl cube butter and allow to sit out at room temperature to soften.
Preheat oven to 350℉ and line baking sheets with parchment or silicone baking mats.
In a medium mixing bowl combine dry ingredients: almond flour, brown rice flour, cassava flour, baking soda, xanthan gum, Homemade Pumpkin Pie Spice and salt. Whisk until well combined.
Using an electric hand mixer on LOW cream softened butter until smooth. Add ¾ cup coconut sugar and cream together on MED-LOW until smooth.
Add egg and blend on MED-LOW until fully combined.
Remove top layer of napkins from pumpkin puree. Carefully lift the napkin and scrape pumpkin puree into butter, sugar and egg mixture. Mix on MED-LOW until fully incorporated.
Add dry ingredients to wet ingredients and use a silicone spatula or wooden spoon to mix until fully combined. It should be moist with no noticeable bits of flour.
Make sugar and spice coating: in a shallow bowl or rimmed plate add ¼ cup coconut sugar and 1 teaspoon Homemade Pumpkin Pie Spice. Whisk together to fully combine.
Using a shallow 2 tablespoon measuring spoon (or 1 tablespoon and double scoop) scoop dough and roll gently into balls careful not to squeeze tightly.
Roll balls in generous coating of coconut sugar and pumpkin pie spice blend.
Place on cookie sheet at least 1" apart and press down gently to make 2-2½" round cookies.
Bake for 10-11 minutes until browned and no longer moist looking on the outside. Allow to cool 5 minutes for cookies to set up.