Preheat your oven to 180°C (350°F) and prepare a baking pan by lining it with parchment paper.

In a mixing bowl, thoroughly combine the peanut butter, Erythritol, and egg. You can use a spatula or your hands to mix until a dough forms.

Roll the dough into balls and arrange them on the prepared baking pan. Flatten each ball with your palm or the back of a fork to your desired thickness, and feel free to shape them creatively.

Bake in the preheated oven for 10 minutes, or until they turn golden brown.

Let the cookies cool to room temperature before serving.