01 -
Set your oven to 350°F (175°C) and line a baking tray with parchment paper or a silicone mat.
02 -
In a large mixing bowl, beat the softened butter, granulated sugar, and brown sugar until the mixture is light and fluffy.
03 -
Mix in the peanut butter, egg, and vanilla extract until they are evenly blended.
04 -
In a separate bowl, whisk together the flour, baking soda, and salt. Slowly add this dry mixture to the wet ingredients, mixing gently until just incorporated.
05 -
Fold in the chocolate chips and chopped Reese's peanut butter cups, making sure they are evenly distributed.
06 -
Using a small cookie scoop or tablespoon, portion the dough into 1-inch balls and space them about two inches apart on the prepared baking sheet.
07 -
Bake for 8 to 10 minutes, just until the edges turn golden. The centers will appear soft but will set as they cool. Let them rest on the tray for 5 minutes and then move to a wire rack to cool completely.