Step 1

Preheat oven to 350°F. Line two baking sheets with parchment paper.

Step 2

Mix peanut butter, sugar, and egg together in a bowl using an electric mixer or spoon, until smooth and creamy. Roll mixture into small balls and arrange on a baking sheet; flatten each with the back of a fork, making a criss-cross pattern.

Step 3

Bake in the preheated oven for 10 minutes. Cool cookies on the baking sheet for 2 minutes before moving to a cooling rack for a few more minutes.