Preheat oven to 350°F.

Combine butter and both sugars in the bowl of a stand mixer. Mix on speed 2 for 4 minutes.

Add eggs, one at a time, mixing on speed 2 until incorporated and scraping sides to ensure that the batter is thoroughly mixed.

Add vanilla and peanut butter, mix on speed 2 until fully combined.

Add flour, salt, and baking soda, mixing until batter is cohesive.

Add chopped peanut butter cups to dough, stirring until distributed.

Line a baking sheet with parchment paper.

Scoop heaping teaspoons of dough onto the prepared sheet.

Bake for 10-12 minutes or until the cookie bottoms are golden.

Transfer cookies to a baking rack and cool fully.