A popcorn popping unit has a heating element and a blower fan, and a cooking surface adapted to receive kernels of corn. The popping unit is configurable for two flow paths of pressurized air through the popping unit. In the first path, pressurized air is configured to flow over the heating element, flow over the cooking surface, cook the kernels of corn, and move the cooked kernels of corn to a serving dispenser. In a second path, pressurized air is configured to flow over the cooking surface, and move un-popped seeds into a seed collection bin.