Cream the softened butter, brown sugar, and white sugar in a stand mixer on medium speed for about 2 minutes, until light and smooth.
Add the milk and vanilla extract and mix until fully combined. Lower the speed and gradually add the flour and salt, mixing just until a soft dough forms. Fold in the mini chocolate chips by hand.
Line a baking sheet with foil. Roll the dough into small balls, about 1 tablespoon each, and place them evenly on the tray. Freeze for 1 hour, or until firm. This helps keep the dough neat when wrapping.
Prepare the brownie mix according to package directions. Bake at the listed temperature, usually 350°F, then let cool completely. Once cooled, cut the brownies into 1 inch squares. If they crumble easily, they may be overbaked. Slightly underbaked brownies wrap more smoothly.
Gently flatten one brownie square in your palm. Place a frozen cookie dough ball in the center and wrap the brownie around it, sealing all sides. Smooth out any cracks with your fingers. Return the wrapped bombs to the foil-lined sheet and freeze for 30 minutes until firm.
Melt the Candiquik or almond bark according to package instructions, microwaving in 30 second intervals and stirring between each until smooth.
Dip each brownie bomb into the melted chocolate using a fork. Tap gently to remove excess coating, then place back on the foil. Sprinkle with extra mini chocolate chips before the chocolate sets.
Refrigerate for 20 to 30 minutes, until the chocolate shell is fully set and glossy.