A method of preparing a blended food product includes the steps of: introducing a composition of food product(s) into a container, providing a closure for the container, the closure carrying an impeller; inverting the container so that the closure with its blending element lies lowermost; and driving the blending element to blend the composition to form a blended food product. Prior to blending, the container is mounted in a holder and clamped in place between the closure and the holder, to prevent leakage during blending. The holder may be in the form of a sleeve. A drive master is also provided for use with two sets of blending lids.