Whey or milk serum is the liquid by-product obtained after the initial stage of cheese production which involves curdling and straining. It has various culinary uses such as in production of brown cheese, ricotta, processed foods like breads and pastries, or as a nutritional supplement for body building. It is a rich source of protein and useful in muscle building for sportspersons, pregnant women and growing children.
Types of Whey
Whey can be categorized into the following two types-
Sweet Whey: This is the by-product obtained by making cheese from rennet, as in production of Swiss or Cheddar cheese.
Acid Whey: This is whey obtained as a by-product during production of acid type cheeses like cottage cheese.
Ingredients and Preparation
Milk and rennet or acidic substances like vinegar are the basic ingredients required for making whey.
When rennet or an edible acid is added to milk during cheese production, curdling takes place and the liquid that separates from the milk is called whey.
A recipe for a wine whey drink from the 18th century suggests adding half a pint of white wine to a pint of skimmed milk and allowing them to stand for a few minutes, and then adding a pint of boiling water. The milk would curdle, and the curds would collect at the bottom, and the liquid is poured into a separate bowl, to which sugar is added and a lemon slice or balm sprig are used for garnish.
Another old recipe suggests adding cream of tartar to boiling blue milk and then removing form heat and allowing it to stand. The milk curdles and the curd collects at the bottom while the whey is consumed milk warm. Here, blue milk refers to milk characterized by blue fungal spots on its surface, which appear on the milk eighteen to twenty four hours from its being drawn, and enlarge to form a blue colored milk on the surface.
Culinary Uses
Whey can be put to a lot of culinary uses, main ones being as follows-
Nutritional Information
Whey is a nutritious liquid and a good source of protein. Whey contains most of the benefits of milk yet much less potential to cause allergies than milk, due to the absence of caseins in it. Protein contained in it provides the building block for muscles, and helps in maintaining lean muscle mass. People active in sports, recovering from long illness, children, teenagers and pregnant women have greater protein needs and benefit from drinking whey. Athletes to benefit form it as they break down higher levels of proteins. Whey is easy to consume and can be taken in many different forms, chosen as per individual preference, such as whey drink, whey protein and so on. It is also known to be helpful in wound healing.
Whey protein as a health supplement is known to help in weight management, body building, improving immunity, promoting bone health and for general wellness. High protein intake has a satiating effect and hence helps in curbing hunger and causing weight loss.
Trivia
The mention of whey can be found in Joseph Priestley's records during his college years in Daventry Academy (1752-1755). He mentions his going out with a large company for drinking whey.