Preheat oven to 325F (163C).
Mix protein powder, coconut flour, baking powder, salt, and 1 tablespoon of erythritol.
½ cup unflavored whey/casein protein blend, 2 tablespoons coconut flour, ½ teaspoon baking powder, a pinch of sea salt, 1 tablespoon granulated erythritol
Add lemon zest, lemon juice, vanilla, and coconut oil. Mix well. Use your hands to press the dough together.
zest of ½ lemon, 2 -3 tablespoons lemon juice, ½ teaspoon vanilla extract, 2 tablespoons coconut oil
Separate into 8 pieces, and roll each into a ball. Set on a piece of parchment paper.
Pour 1 tablespoon of erythritol on the parchment (not on the cookies).
1 tablespoon granulated erythritol
Press each cookie into the erythritol, flattening it out. Then place the cookie (erythritol side up) onto a parchment-lined cookie sheet.
Bake for about 13 minutes, or until firm.
Enjoy!