Preheat the oven to 350°F (175°C).

In a mixing bowl, combine peanut butter, granulated sugar, brown sugar, egg, and vanilla extract. Mix until smooth.

Add baking soda and salt, and mix until well combined.

Using a cookie scoop, drop dough onto a baking sheet lined with parchment paper.

Flatten each cookie slightly with a fork, creating a crisscross pattern.

Bake in the preheated oven for 8-10 minutes or until edges are lightly golden.

Remove from oven and let cool on the baking sheet for a few minutes before transferring to a wire rack.