Preheat oven to 350 degrees F. In a stand or electric mixer, beat the butter and sugar until light and well combined. Add egg, sour cream and brownie batter until well combined.

Place flour, cocoa powder, baking powder, and salt into a large bowl. Slowly add to wet ingredients along with mini chips until just combined. Using a cookie scoop, scoop dough onto a parchment or silpat lined baking sheet. Bake for 9-11 minutes or until cooked through. Let cool on cookie sheet for 5 minutes then transfer to cooling rack.