Preheat oven to 350°, set oven rack in middle position.
Spray a 10" Bundt pan with non-stick organic spray. {You can use a 13 x 9 baking pan}
In a large bowl add butter. Maple syrup, vanilla extract, pumpkin puree, 1/2 tsp. ground ginger, egg yolks and coconut oil. stir until combined.
In a second bowl whisk together almond flour, tapioca flour, coconut flour, baking powder, salt and pumpkin spice mix.
Add dry ingredients into wet, slowly stirring until combined. Set aside
Add a pinch of salt to egg whites and beat with an electric mixer just until they hold soft peaks. Gently but thoroughly fold egg whites into the batter.
Spoon batter into prepared pan, spreading it evenly with a rubber spatula.
Bake for 40-45 minutes or until cake tester comes out clean. {If using 13 x 9" pan, 30-35 minutes}
Set pan aside on rack to cool for 10 minutes.
Carefully run a knife around inside edges of pan, invert the cake onto a cooling wrack and gently remove from pan. Let cool completely before serving.
Dust top of cake when cool with confectioner’s sugar {optional}. Slice and serve.