a topping dispenser for dispensing portions of chilled topping onto beverages and desserts comprises a housing having a drawer that includes a product compartment and an adjacent drive compartment separated by a partition . the product compartment is adapted to receive a bag containing topping , and houses a vertically displaceable pressure member , such as a roller , to roll down along one side of the bag opposite a pressure surface on the other side of the bag to squeeze contents of the bag out through a bottom dispensing valve assembly to direct product into a waiting container . the roller is advanced downward in predetermined increments by a motor - driven carriage assembly in the drive compartment that may be actuated by a push button on the housing . the dispensing valve assembly holds a pressure - actuated valve that closes automatically to cleanly cut off a dispensed ribbon of topping and is configured to impart a decorative appearance to the dispensed ribbon . an alternative embodiment uses a piston and cylinder to force product from the bag .