In a food processor, pulse together coconut flour, coconut flakes, sugar, salt, cardamom, and baking powder.
Add butter, eggs, vanilla, and rum essence and pulse until a soft dough forms.
Add blueberries and mix just to combine.
Form a circle about 1 inch thick and cut across to make 8 scones.
Transfer scones to a parchment lined baking sheet.
Bake in a preheated oven at 350 degrees for about 18 minutes or until the tops are golden.
Combine coconut milk with powdered sugar and a drop of rum essence and pour over the scones.