This cheese blend is a processed cheese that combines white cheddar, smoked provolone, and swiss cheese. It's widely available in the Midwest, but harder to find elsewhere in the country. Thankfully it's easy to make a good substitute using the three types of cheese that can be found in the cheese aisle of any grocery store. If you have a hard time finding smoked provolone, you can add 1/2 teaspoon liquid smoke to the cheese blend for that smoky flavor.