Preheat your oven to 350°F (175°C).

In a large mixing bowl, combine the peanut butter, sugar substitute, and egg. Mix until smooth.

Scoop out portions of the dough and place them on a baking sheet lined with parchment paper, about 2 inches apart.

Flatten each dough ball with a fork to create a crisscross pattern.

Bake the cookies for 10–12 minutes until edges are set and lightly golden.

Let the cookies cool for about 5 minutes on the baking sheet before transferring to a wire rack.