Abstract: A beverage supply apparatus for placement atop a beverage dispenser bowl comprises a housing, a mounting flange and a hopper within the housing for storing dry beverage powder mix. The hopper holds a quantity of powder beverage mix and dispenses powder mix from the hopper through an outlet. A whipping chamber disposed between and in communication with the hopper outlet and the bowl has a mechanical impeller contained therein. A water supply line is in selective communication with the whipping chamber via a water control valve. A probe measures the quantity of mixed beverage in the bowl, where a control circuit automatically activates the hopper agitator, opens the water control valve and activates the mechanical impeller in the whipping chamber when sensing a quantity of mixed beverage in the bowl below a predetermined quantity. The mix and water is substantially completely mixed into a homogenous beverage mixture having a predetermined consistency prior to passage of the beverage mixture to the bowl.