Preheat your oven to 350°F (175°C) and line a baking sheet with parchment paper.

In a large bowl, combine the rolled oats, nut butter, protein powder, sweetener, egg, vanilla extract, baking soda, and salt until a cohesive dough forms.

Scoop spoonfuls of dough and drop them onto the lined baking sheet, spacing them about 2 inches apart.

Bake for 10-15 minutes until the edges are golden brown and the centers are slightly soft.

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