1️⃣ Preheat the oven to 350°F (175°C). Line a baking sheet with parchment paper.
2️⃣ Mix the peanut butter, sugar, and egg in a bowl until well combined.
3️⃣ Shape the dough into small balls and place them on the prepared baking sheet.
4️⃣ Flatten each ball gently with a fork, creating a crisscross pattern.
5️⃣ Bake until the edges are golden, 10 to 12 minutes.
6️⃣ Cool the cookies on a wire rack before serving.