In a medium size mixing bowl, sift together the flour, soda, baking powder, and salt: set aside.
In a large mixing bowl, cream together the butter and peanut butter, using an electric mixer.
Add the sugars and eggs, beat until well combined.
Gradually add the dry ingredients in 3 portions; beat only until well combined.
Set aside the mini peanut butter cups; stir in the remaining mini candies. Chill dough for 1 hour.
Preheat the oven to 350 degrees F. Line baking sheets with parchment paper.
Using a small scoop or spoon, roll dough into 1 1/2 inch balls. Roll balls in the sugar.
Place on parchment lined baking sheet. Bake for 8-10 minutes, or until cookie edges start to become golden brown. Remove from oven and allow to set on baking sheet about 5 minutes.
Transfer to a wire rack to cool slightly, add mini peanut butter cups to center of cookies