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

In a large mixing bowl, combine peanut butter, granulated sugar, and brown sugar. Blend on medium speed for about 2 minutes.

Add the egg and blend until fully incorporated, which should take another minute.

In a separate bowl, whisk together flour, baking soda, and salt. Gradually add to the peanut butter mixture, folding gently.

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

Bake for 10-12 minutes until edges are golden brown and centers are slightly underbaked.

Cool on baking sheets for about 5 minutes before transferring to wire racks.

Store cookies in an airtight container at room temperature for up to a week.