Preheat your oven to 350°F (175°C) and line a baking sheet with parchment paper.

In a large mixing bowl, combine the sugar, peanut butter, egg, and vanilla extract. Mix on medium speed for 8-10 minutes until well incorporated.

Scoop the dough and roll into balls, placing them 2 inches apart on the lined baking sheet.

Press down with a fork to create a criss-cross pattern on each cookie.

Bake for 10-12 minutes until dry and the tops are no longer shiny. Golden edges indicate they are done.

Cool on the baking sheet for 5-10 minutes before transferring to a wire rack.