Abstract: An automated apparatus for mixing ingredients stored in closed containers includes two or more mixing mechanisms. A diverter gate upstream of the mixing mechanisms guides containers to one or the other mechanism, as desired. Powered conveyors move the containers past the diverter gate and retractable pusher arm assemblies load the containers onto the mixing mechanisms. After a mixing operation is completed, the pusher arm assemblies discharge the containers onto an exit conveyor for transport to a remote packaging station. Sensors are disposed along the path of travel of the pusher arm assemblies to control operation thereof, providing a ready indication that a container is properly positioned on a mixing mechanism, and that the mixing operation can be initiated.