The disposable agitator for mixed food products has an elongated stem, which has, at a longitudinal end, an agitator blade having the shape of a spoon, and can be removably fixed to the rotary shaft of a mixer, so that the consumer can subsequently use the agitator as a utensil for eating the product previously mixed; the agitator has at least one longitudinal rib, projecting transversally from the stem and/or from the agitator blade and at the same time acting as an agitator stiffening element and an active element in the mixing action.