Named after its creator, David Jacks, a cheesemaker near Monterey, California. Jack cheese is made from pasteurized whole, partly skimmed or skimmed cow's. Monterey Jack Cheese is a semi-soft cheese made from cow's milk, whole or skimmed. It's normally aged two weeks to a month. It's somewhat like a cheddar, . Monterey Jack is a semi-hard cheese made from cow's milk. Spicy, tender chicken, onion, and cheese make a delicious panini, but what elevates this dish is.