Can I use Cheddar cheese for pizza?
You can use small amounts of cheddar mixed with the other cheeses. But you'd be disappointed in the results if you tried to use it as the main or only cheese on the pizza.

Cheddar cheese doesn't tolerate sustained, high heat as well as some other cheeses. It can scorch, which tastes and smells bad, and/or the fats can separate from the solids as a yellowish oil. The sharper the cheese is, the less well it will tolerate heat.