the desired frozen composite food product are simultaneously supplied into the tank 1 from the reservoirs 11 and 12 upon contact with the frozen pieces of the first component the second component starts to freeze thereon and is anchored gradually more firmly to the surface thereof should it be necessary for operative reasons to increase the rate of cooling of the second component there is provision for a supply continuous or intermittent of refrigerant fluid from the reservoir 13 the first component tends to collect on the bottom 1a of the tank 1 and because of the inclination of the tank to move towards the output end 10 during this movement and as soon as it starts to accumulate on the bottom of the tank 1 the mass of non coherent loose pieces of the first component is 34 picked up 34 by the mixing blade 22 by which it is thrust upwards first on one side and then on the other along the internal wall of the body the magnitude of this thrust is sufficient for at least some of the mass of loose pieces to continue their upward movement along the internal wall even when the movement of the blade has reversed upon the reversal of this movement this portion of the mass of loose pieces basically performs a jump and the direction of this jump is 34 guided 34 by one or other of the arcuate elements deflectors 24 which cause it to fall towards the bottom of the tank 1 onto the rest of the mass in the second embodiment of the apparatus according to the present invention shown in fig2 the.