As we have already mentioned earlier, this cheese is of the Pasta Filata or stretched curd style in which the cheese proteins develop a unique character for forming long chains and will stretch out into long threads when heated.
The cheese first relies on a natural dairy bacteria to convert the milk sugars (lactose) to lactic acid. The milk is then heated before the bacteria begins working. Then after a small amount of lactic acid is produced, the rennet is added and the milk allowed to sit quiet while a firm curd develops.
Once the firm curd develops it can be cut to release the whey. The curd is then stirred for varying lengths of time and the temperature may be raised during this time. The size of the cut, how long it is stirred, and the final temperature will determine the final moisture and in turn the amount of time the cheese should be aged.
Once the curd reaches the proper moisture (this is quite variable depending on the cheeses targeted here) the whey is drained and the curds consolidated in draining bags or forms.
At this point the curds will be kept warm while the bacteria continue to reduce the lactose to lactic acid. As this happens the taste of the cheese will go from a sweet milk flavor to a moderate acid flavor.
The final acid is quite important because the ability of the curd to stretch will be determined by a very specific acid level (pH 5.3-5.2) and temperature (130-140F). Too much acid and the cheese will not retain its shape and texture but too little acid and the cheese will not stretch. The final moisture of the cheese will also determine how well the cheese stretches. If it is too dry the stretch will poor and too moist and the final cheese will not keep its shape and texture.
The final step in this process is the stretching. The acidified curd is cut into narrow strips and heated in hot water or whey until it begins to stretch. The stretching is important for this style because it realigns the proteins in the cheese to give its characteristic texture and mouthfeel.
The Caciocavallo needs no forms because the final form is done by stretching in your hands and forming into an elongated pear shape.
When you reach the final form, the cheese must be chilled in cold water to retain its shape and then brined. When it comes out of the brine it is ready to be tied and hung until ready to eat.