Preheat your oven to 350°F and gather your ingredients! Place half a cup of granular erythritol into a Nutribullet and blend for a few seconds. You should end up with a fine, powdered sweetener!
Combine the peanut butter, powdered erythritol and the egg and mix very well.
Roll the cookie dough into 1-inch balls and place on a parchment paper lined baking sheet. Press down with a fork twice to create the iconic peanut butter cookie pattern.
Bake in the oven for about 10-15 minutes or until you see the cookie edges turn a darker brown.
Let them cool on a wire rack and enjoy with a yummy glass of nut milk!