In a large bowl, cream together peanut butter, granulated sugar, and brown sugar until light and fluffy.
Beat in eggs one at a time, then stir in vanilla.
In a separate bowl, whisk together flour, baking soda, and salt. Gradually add to the wet ingredients, mixing until just combined.
Roll dough into 1-inch balls. Place on ungreased baking sheets.
Gently press a mini peanut butter cup into the center of each cookie.
Bake for 8-10 minutes, or until edges are lightly golden brown. Let cool on baking sheets for a few minutes before transferring to a wire rack to cool completely.
Notes
Enjoy these delicious peanut butter cup cookies warm or at room temperature.