Once brownies are prepared and cooled, crumble half of the pan into a large bowl. Add most of the chocolate icing (about 12oz, give or take). Mixture should not be overly sticky but should bind together.
With your hands, take 2 tbsps of brownie mix and roll into a ball. Place on a cookie sheet lined with a silicone liner or parchment paper. Once all of the mixture is made into balls, chill in the refrigerator for 1-2 hours.
With a double boiler, melt chocolate and butter together until stirrable and glossy. Using two spoons, dip balls into chocolate to coat; place back on lined cookie sheet. Place back in the refrigerator for 1-2 hours to allow chocolate to set.