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

In a large mixer bowl, cream together the peanut butter and softened butter until smooth. Add in granulated sugar and brown sugar, mixing until light and fluffy.

Add the egg and vanilla extract, beating until combined.

Sift together the flour, baking soda, and salt in a separate bowl. Gradually add to the wet ingredients, mixing until just combined.

Roll the dough into 1-inch balls and place them on the baking sheet, creating a crisscross pattern with a fork.

Bake for about 10 minutes, until edges turn light golden while centers remain soft.

Cool on the pan for 10 minutes before transferring to a wire rack to cool completely.