Preheat your oven to 350°F (175°C) and line a baking sheet with parchment paper. This simple step prevents sticking and makes cleanup effortless.
In a medium mixing bowl, combine the peanut butter, sweetener, and egg.
Mix thoroughly with a wooden spoon or spatula until all ingredients are well incorporated and the mixture has thickened slightly. The dough should hold together when pressed but remain slightly sticky.
Using a cookie scoop or tablespoon, portion the dough into 12 equal portions.
Roll each piece between your palms to form smooth balls, then place them on your prepared baking sheet with about 2 inches of space between each cookie.
Using a fork, gently press down on each ball to create a crosshatch pattern.
Bake for 8-10 minutes at 350°F, until the edges are set and lightly golden brown. The centers should still appear slightly soft as they'll continue to cook while cooling.
Allow cookies to cool on the baking sheet for 5 minutes before transferring to a wire rack to cool. Allow the cookies to cool for a few more minutes and enjoy!