In a large mixing bowl, beat the butter and sugar in the bowl of an electric mixer on high speed until fluffy.
Add the eggs, one at a time, and beat until mixed. Add vanilla and beat until mixed.
In the same bowl, add the baking powder and salt and beat until mixed.
Add the flour, a small amount at a time, and beat on medium speed until mixed well.
Roll the dough into about 1-inch balls, then place each ball into an ungreased mini muffin tin/pan.
Bake 10-12 minutes or until edges are light golden brown.
Immediately press a melty mint candy into the center of each cup. Allow the cookie cups to cool 10 minutes in the pan and then remove from pan to a wire rack to cool completely.
Recipe by Wishes and Dishes at https://wishesndishes.com/melty-mint-sugar-cookie-cups/