A blade assembly for use with a food processor includes a hub configured to be coupled to a drive shaft of the food processor, a first blade rotatably coupled to the hub and configured to rotate with respect to the hub at least up to a predetermined angle with respect to a second blade, which is fixedly coupled to the hub. The first blade is rotatable between a first position in which it is in phase with the second blade for receiving a blade guard protecting both blades, and a second position, in which the first blade is out of phase with the second blade for optimally processing a food item in the food processor, the blade assembly also including a biasing member for returning the first blade to the first position after use.