Preheat the oven to 350°F and line a baking sheet with parchment paper.
Add all the ingredients to a medium mixing bowl and mix to combine using a spatula or hand mixer.
Using a Tablespoon scoop the dough and roll into balls placing 2-inches apart on the baking sheet.
Flatten each dough ball with a fork, making a crisscross pattern.
Bake for 9-12 minutes, or until the cookies are slightly golden brown around the edges and the bottom.
Remove and immediately sprinkle with flaked sea salt, if using. Let cookies cool and few minutes on the baking sheet then transfer to a cooling rack to cool completely
Notes
Egg-free option: If you're looking for a vegan peanut butter cookie, or just interested in making an egg-free version, I highly recommend trying my healthy peanut butter cookies!
Storage: Keep these cookies in an airtight container at room temperature for up to a week. For longer storage, freeze them in a freezer-safe container with parchment paper for up to 3 months. If they lose their crispness, reheat in a 300°F oven for 5-10 minutes.