Monterey Jack is a semi-firm, creamy, mild flavored cheese made from cow's milk that's aged for a short period.From there, you have the other cheese derivatives, including Pepper Jack, Colby Jack, and Cheddar Jack.Pepper Jack has sweet peppers, fresh herbs, habañero chilies, garlic, and jalapeños.Colby cheese, an orange, semi-hard cow's milk cheese, is mixed with Monterey Jack to form Colby Jack.Cheddar Jack is a mix of Cheddar and Monterey Jack