Cheese making

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  • 1.Cheese making

2. Introduction Cheese is a generic term for a diverse group of milk-based food products. Cheese is producedthroughout the world in wide-ranging flavours,textures, and forms. Cheese consists of proteins andfat from milk, usually the milk ofcows, buffalo, goats, or sheep. It is produced by coagulation of the milk protein casein. 3. Objective of cheese making To obtain the optimum cheese composition with respect to moisture, acidity (pH), fat, protein and minerals (especially calcium) Establish the correct structure of the cheese at the microscopic level; and Ripen to perfection. Grouped according to texture and basic manufacturing procedures there are seven families of cheese. 4. First Step Milk from the evening milking is allowed to standovernight. By natural processes, this milk will have partiallyseparated during its overnight standing period. The cream isskimmed off, and the partially skimmed milk is combinedwith whole milk from the morning milking. 5. Second StepThe milk is gradually heated to 30 to 35 C (86to 95 F)before acidificationand coagulation. 6. Step 3 Acidification: Starter culture is added to milk tochange lactose (milk sugar) into lactic acid. Thisprocess changes the acidity level of the milk andbegins the process of turning milk from a liquid intoa solid. 7. Starter culture Fermentation starters (called simply starters withinthe corresponding context) are preparations toassist the beginning of the fermentation process inpreparation of various foods and fermented drinks.A starter culture is a microbiological culture whichactually performs fermentation. 8. Step 4Coagulation: Rennet is added to further encouragethe milk to solidify ,forming a custard-like mass. 9. rennet .Rennet An enzyme used to coagulate milk duringthe cheese making process. Rennet is derived fromone of four sources: the stomach lining of a youngcalf (the enzyme rennin is found in the stomachlining of animals because it aids in the digestion oftheir mothers milk) plants (typically thistle) microbes in fungus and yeast Genetically engineered rennet that imitates animal rennet. 10. Step 4Cutting:- Its then cut into small pieces to begin the process ofseparating the liquid (whey) from the milk solids (curds).Large curds are cooked at lower temperatures, yielding softer cheeses like Mascarpone and Ricotta. Curds cut smaller are cooked at higher temperatures,yielding harder cheeseslike Gruyere and Romano 11. Step 5Stirring, Heating & Draining:-Cheese makers cook and stir the curds and whey untilthe desired temperatureand firmness of thecurd is achieved. Thewhey is then drained off, leaving a tightly formed curd. 12. Here you can see the cheese makertaking some of the whey out of the vat. 13. Step 6 Salting: Salt adds flavour and also acts as a preservative so thecheese does not spoil during long months or years of ageing. It alsohelps a natural rind to form on the cheese. There are several ways touse salt. Salt can be added directly into the curd as the cheese isbeing made. The outside of the wheel of cheese can be rubbed withsalt or with a damp cloth that has been soaked in brine. The cheesecan also be bathed directly in vat of brine. Concentrated brine.adding the salt directly into the drained curd 14. Step 7 Curd TransformationDifferent handling techniques and salting affecthow the curd is transformed into the many cheesevarieties made. 15. Shaping:Step 8The cheese is put into a basket or a mold to form it into a specific shape. During this process, the cheese is also pressed with weights or a machine to expel any remaining liquid.Pressing determinesthe characteristic shape of the cheese andhelps complete thecurd formation. Mostcheeses are pressed inthree to 12 hours, depending on their size. 16. Step 9Ripening: Referred to as affinage, this process ages cheese until itreaches optimal ripeness. During this process, the temperature andhumidity of the cave or room where the cheese ages is closely monitored. Forsome cheeses, ambient molds in the air give the cheese a distinctflavour. For others, mold isintroduced by spraying it onthe cheese (brie) or injecting itinto the cheese (blue cheese). Some cheeses must be turned,some must be brushed with oil, and some must be washed withbrine or alcohol. 17. Aging should take place in a controlled environment.Different cheeses required different temperatures andhumiditys, however in a small refrigeratortemperature is keptat 55F and 85%humidity. During aging, the cheese shouldbe rotated or flippedperiodicallyto prevent moisturefrom settling in thecheese and to preventan inconsistent internalconsistency.