Preheat oven to 350 degrees.
In a medium bowl, cream the butter and brown sugar together until fluffy.
Mix in the eggs.
Add the flour, cocoa powder, baking powder, and salt.
Mix until just combined.
Fold in the mini chocolate chips.
Scoop dough by rounded tablespoon and roll each ball into the powdered sugar until evenly coated.
Place cookie dough ball on cookie sheet and continue until sheet is filled. *About 12 per sheet
Bake in preheated oven for about 8 minutes.
Remove sheet from oven and allow to sit 1-2 minutes before removing and placing on cooling rack.
Gently place one Hershey kiss into the center of each cookie. Continue until all cookies have a kiss in the middle.
Serve or allow to cool completely before freezing!