Step 1:
Preheat your oven to 350°F (175°C) and line a baking sheet with parchment paper or a silicone baking mat.

Step 2:
In a medium mixing bowl, combine peanut butter, granulated sugar, egg, and vanilla extract. Stir until the mixture forms a smooth and cohesive dough.

Step 3:
Scoop tablespoon-sized portions of dough and roll them into balls. Place the dough balls about 2 inches apart on the prepared baking sheet.

Step 4:
Use a fork to press a crisscross pattern onto each cookie. This flattens them slightly and adds the classic peanut butter cookie design.

Step 5:
Bake in the preheated oven for 10–12 minutes or until the edges are slightly golden. Let the cookies cool on the baking sheet for 5 minutes before transferring to a wire rack to cool completely.