3 Ingredients Peanut Butter Cookies are so easy-to-make! Use crunchy natural peanut butter and brown sugar for the best results.
Adjust oven racks to upper middle and lower middle positions. Preheat oven to 350 degrees F. Line two rimmed baking sheet with parchment paper.
Stir together peanut butter, sugar, and egg in a medium mixing bowl. Stir in chocolate chips if using. Allow dough to stand for 10 minutes. This step is important. Don't skip it.
Drop dough, about one tablespoon each, onto prepared baking sheets. Lightly press tops of cookies with tines of a fork, making a crosshatch pattern. Sprinkle lightly with granulated sugar, optional.
Bake cookies, until golden brown, about 12 minutes. Allow cookies to cool on the pan for five minutes. Then transfer to a wire rack to cool fully. Store, wrapped, on the counter, for up to four days.