Preheat oven to 350 degrees F.

Line baking sheet with parchment paper and set aside.

In large bowl with electric mixer, beat together the butter, brown sugar, and white sugar until well mixed, about 1 minute.

Add egg and vanilla, beating to combine.

Add peanut butter, beating to combine. Scrape down edges of bowl if needed.

Add baking soda, salt, and flour, and beat until well combined.

Fold in chocolate chips.

Form dough into ~1 tablespoon balls and place onto baking sheets, spacing 3" apart.

Press down the balls to flatten slightly.

Bake in preheated oven for 9-11 minutes, until middle is slightly set. They should seem a little under-baked but they will set up as they cool.

Let cool for 5 minutes on baking sheet then transfer to cooling rack to cool completely.

Repeat with remaining dough.

Enjoy!