Preheat oven to 325F (163C).
Mix cashew butter, water, and stevia until combined. Start with only 2 tablespoons of water.
⅓ cup cashew butter, 2 tablespoons filtered water, 2 packets stevia
Add protein powders and cocoa, and mix to combine. You may need to use your hands. And if you need more water, add by the teaspoon.
2 tablespoons natural chocolate whey protein, 2 tablespoons chocolate pea protein, 1 tablespoon black cocoa powder
Roll or press the dough to flatten (easier to roll between sheets of parchment paper).
Use a cookie cutter to cut 12 circles, and lay them on a parchment-lined cookie sheet.
Bake for about 12 minutes, or until firm.
Remove from oven and let cool.
Mix confectioners erythritol with water.
1 tablespoon water, ¼ cup confectioners erythritol
Turn 6 cookies over, and spread with icing. Top with additional cookies. Enjoy!