Prepare the Baking Sheet: Preheat the oven to 350°F. Line a baking sheet with parchment paper and set it aside.
Combine Peanut Butter and Sugar: Place the creamy peanut butter and granulated sugar in the bowl of a stand mixer fitted with the paddle attachment. Mix on medium speed until the mixture is combined and creamy.
Finish the Dough: Add the egg and baking soda to the peanut butter mixture. Continue mixing on medium speed until the dough is smooth and evenly combined.
Shape the Cookies: Use a medium 2-tablespoon cookie scoop to portion the dough, then roll each portion into a ball. Arrange the dough balls on the prepared baking sheet.
Create the Crisscross Pattern: Press each dough ball down gently using a fork, forming the classic crisscross pattern on the surface of the cookies.
Bake the Cookies: Bake for 9–10 minutes, or until the cookies are set around the edges.
Cool on the Baking Sheet: Leave the freshly baked cookies on the baking sheet for 3–4 minutes so they can cool slightly and settle.
Cool Completely: Carefully transfer the cookies to a wire rack and allow them to cool completely before serving.