An electrical appliance for preparing juice by pressing foods, including: - a chute for taking in food toward the bottom; - a screw for processing foods leaving the chute, said screw being centered on an axis (X-X) and including: - an upper stage that is provided with means for sweeping the outlet of the chute, suitable for acting on the foods leaving the chute to fragment them, and - a lower stage, which is separate from the upper stage of the screw and which is designed to drive and press the fragments of food downward coming from the upper stage of the screw; - a chamber for receiving the screw, this chamber being substantially centered on the axis (X-X) and including: - an upper part that is connected to the outlet of the chute to receive the foods leaving the chute and that surrounds the upper stage of the screw, and - a lower part, which surrounds the lower stage of the screw and is designed to separate the juice from the food fragments when the latter are pressed by the lower stage of the screw; and - means for driving the screw, which include at least one electric motor (31, 33) and which are suitable for driving the upper and lower stages of the screw around the axis (X-X), relative to the chamber, at different respective speeds and/or in different respective directions, characterized in that the driving means are designed for driving each of the upper and lower stages of the screw adjustably and independently of the other stage. - a chute for taking in food toward the bottom; - a screw for processing foods leaving the chute, said screw being centered on an axis (X-X) and including: - an upper stage that is provided with means for sweeping the outlet of the chute, suitable for acting on the foods leaving the chute to fragment them, and - a lower stage, which is separate from the upper stage of the screw and which is designed to drive and press the fragments of food downward coming from the upper stage of the screw; - an upper stage that is provided with means for sweeping the outlet of the chute, suitable for acting on the foods leaving the chute to fragment them, and - a lower stage, which is separate from the upper stage of the screw and which is designed to drive and press the fragments of food downward coming from the upper stage of the screw; - a chamber for receiving the screw, this chamber being substantially centered on the axis (X-X) and including: - an upper part that is connected to the outlet of the chute to receive the foods leaving the chute and that surrounds the upper stage of the screw, and - a lower part, which surrounds the lower stage of the screw and is designed to separate the juice from the food fragments when the latter are pressed by the lower stage of the screw; and - an upper part that is connected to the outlet of the chute to receive the foods leaving the chute and that surrounds the upper stage of the screw, and - a lower part, which surrounds the lower stage of the screw and is designed to separate the juice from the food fragments when the latter are pressed by the lower stage of the screw; and - means for driving the screw, which include at least one electric motor (31, 33) and which are suitable for driving the upper and lower stages of the screw around the axis (X-X), relative to the chamber, at different respective speeds and/or in different respective directions,