Whey which is left after cooking and draining curds, is still very nutritious and should not be wasted!
It contains milk, sugar, protein and minerals which are great for your health. It is consequently a great substitute for water and other liquids in many foods including bread or pizza, used as stock or in smoothies instead of milk, water or juice.
Whey can also be sprayed in the garden. It is especially beneficial for acid-loving plants. Animals also love whey so you may like to feed it back to your farm animals or pets.