01 -
Preheat oven to 190°C and line a baking sheet with parchment paper or a silicone baking mat.
02 -
Combine softened butter, light brown sugar, and granulated sugar in a large mixing bowl. Beat until light and creamy.
03 -
Add the egg, creamy peanut butter, and vanilla extract to the creamed mixture. Mix until thoroughly blended.
04 -
Scrape down the sides of the bowl, then add all-purpose flour and baking soda. Mix on low speed until just combined.
05 -
With a spatula, gently fold in mini Reese's Peanut Butter Cups and mini Reese's Pieces evenly throughout the dough.
06 -
Using a medium cookie scoop, portion dough into evenly sized balls and arrange them on the prepared baking sheet, leaving space between each.
07 -
Press a few extra mini Reese's Pieces onto the top of each portioned dough ball for decoration.
08 -
Bake in the preheated oven for 10 minutes, or until the edges have turned golden brown.
09 -
Allow cookies to rest on the baking sheet for several minutes until set, then transfer to a wire rack to cool completely.