While Caldo Tlalpeño is not traditionally served with cheese, some people may choose to add a sprinkle of crumbled cheese on top of the soup as a garnish. If you want to add cheese to your Caldo Tlalpeño, you can use a mild and crumbly cheese, such as queso fresco or feta cheese. These types of cheese will add a salty and tangy flavor to the soup without overpowering the other ingredients.