Cheese is a food item made from milk at the farmer's workshop with the cheese making labor. It can be eaten as is or cooked into prepared meals.
A single "Make cheese" job will take a barrel of milk to the workshop and produce several stacks of cheese of size 5 or less - for example, a barrel containing 17 units of milk will produce 3 stacks of 5 cheese and 1 stack of 2 cheese.
The milk of any milk-producing animal can be converted to cheese. With the exception of dwarven cheese, which is made from dwarven milk and has the value of 20☼, all cheeses are priced at the value of 10☼.
Counterintuitively, while milk in a barrel won't rot, cheese outside of a food stockpile will.