Cream together butter, peanut butter, sugar, vanilla, eggs, and brown sugar in a stand mixer.

In a separate bowl, whisk together baking soda and flour; slowly add to peanut butter mixture.

Form dough into 1-inch balls and place on a greased cookie sheet. Bake for 10 minutes at 375°.

While cookies are baking, unwrap enough Reese's Peanut Butter Cup miniatures for each cookie. Remove cookies from oven and allow to cool for two minutes. Lightly press a peanut butter cup upside down on each cookie. Remove from cookie sheet and place on a cooling rack.