Preheat oven to 325F (163C).
Combine all the dry ingredients: protein powder, cocoa, coconut flour, baking powder, salt, erythritol.
1 cup chocolate whey/casein blend, 2 tablespoons cocoa powder, ¼ cup coconut flour, 1 teaspoon baking powder, 2 pinches salt, 2 tablespoons granulated erythritol
Mix in the coconut oil and almond milk. You may need to use your hands to be sure the dough is well combined.
¼ cup coconut oil, ⅓ cup unsweetened almond milk
Roll the dough on parchment paper, and cut 20 circular cookies using a cookie cutter. Or, roll the dough into 20 balls, and flatten each in your hand.
Place cookies on a parchment-lined baking sheet, and bake for 10-12 minutes until firm.
Remove cookies from oven, and let cool.
Meanwhile, place frosting ingredients in a blender or food processor. Process until smooth.
½ cup chocolate whey/casein blend, 1 avocado, 2 tablespoons cocoa powder, 1 tablespoon date sugar
Make cookie sandwiches by spooning frosting between two cookies.
Enjoy! Store extras in the refrigerator.