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

In a large mixing bowl, combine peanut butter, softened butter, granulated sugar, and brown sugar. Blend until smooth.

Add the egg and vanilla extract, mixing until fully incorporated.

Whisk together flour, baking soda, and salt in a separate bowl, then fold into the wet mixture until just combined.

Using a cookie scoop, drop dough onto the baking sheet with 2 inches of space between each cookie.

Press a fork down on each cookie to create a crisscross pattern.

Bake for 10-12 minutes, until edges are lightly golden. Cool on the baking sheet for 5 minutes before transferring to a wire rack.