Preheat the oven to 350°F (175°C). Line a baking sheet with parchment paper.
Cream the butter, peanut butter, granulated sugar, and brown sugar together in a large bowl until light and fluffy, about 2–3 minutes.
Beat in the egg and vanilla extract until fully combined and smooth.
In a separate bowl, whisk together the flour, baking soda, and salt.
Gradually mix the dry ingredients into the wet ingredients until just combined. Do not overmix.
Fold in the chocolate chips evenly throughout the dough.
Scoop dough using a cookie scoop or tablespoon onto the prepared baking sheet, spacing cookies about 2 inches apart.
Bake for 9–11 minutes, or until the edges are lightly golden but the centers look slightly soft.
Cool the cookies on the baking sheet for 5 minutes, then transfer to a wire rack to cool completely.