In a large mixing bowl, beat together the softened butter and brown sugar until creamy.
Add the vanilla extract and beaten flour to the butter mixture, mixing until well combined.
Fold in the chocolate chips, ensuring they are evenly distributed throughout the dough.
Scoop out tablespoon-sized portions of the dough and roll them into balls, then place on a parchment-lined tray.
Refrigerate the cookie dough balls for about 30 minutes to firm them up.
Meanwhile, in a separate bowl, mix the cocoa powder, sweetened condensed milk, and powdered sugar until smooth.
Dip each chilled cookie dough ball in the brownie coating until fully covered, then place back on the parchment-lined tray.
Sprinkle chocolate sprinkles on top of each brownie-coated ball for decoration and added texture.
Chill the brownie bombs in the refrigerator for at least 1 hour before serving.