Muenster and Fontina are pretty soft cheeses and can be difficult to grate, so just stick both in the freezer 10 minutes to let them firm up before starting.
Recipe information
Yield
6 servings
Ingredients
Preparation
Step 1
Simmer milk, cream, mustard powder, and cayenne in a medium pot over medium heat, stirring and being careful not to let mixture boil, until heated through and well combined, 6–8 minutes. Mix cornstarch and 2 Tbsp. water in a small bowl to make a slurry, then whisk into milk mixture. Bring to a boil and cook, whisking constantly, until mixture thickens, 1–2 minutes. Add cream cheese and cook, whisking occasionally, until mixture is smooth and thick, 2–3 minutes.
Step 2
Reduce heat to medium-low and gradually stir in cheddar, muenster, and Fontina, if using. Cook, stirring occasionally and reducing heat if mixture starts to boil, until cheeses are almost melted (it’s okay if you see a few shreds of unmelted cheese), 4–6 minutes.
Step 3
Meanwhile, cook pasta in a large pot of boiling salted water, stirring occasionally, until al dente. Drain and stir into cheese mixture. Gently stir until sauce is smooth and creamy and pasta is evenly coated; taste and season with salt, if needed. Remove from heat; mac and cheese will thicken as it sits. Serve hot.
