Chipotle’s queso is grainy from the use of aged Cheddar cheese. The American chain prides its food on being natural and uses fresh ingredients, no artificial flavors, colors, or preservatives. Therefore, it does not use thickening and stabilizing agents, making the queso thin and grainy. However, they did make several changes and now use White Cheddar cheese, which melts easily and gels well with the Monterey Jack cheese in queso.