Ingredients
Method
- Cook the pasta. Bring a large pot of well-salted water to a boil. Cook gluten-free pasta according to package directions until al dente — watch carefully as GF pasta can go from perfect to mushy quickly. Reserve 1/2 cup pasta water, then drain.
- Make the roux. In a large saucepan over medium heat, melt the butter. Add cornstarch and whisk constantly for 1–2 minutes until a smooth paste forms.
- Build the sauce. Slowly pour in the warmed milk, whisking constantly to prevent lumps. Continue whisking over medium heat for 4–5 minutes until the sauce thickens enough to coat the back of a spoon.
- Add the cheese. Remove from heat and stir in cheddar, Gruyère, and Parmesan a handful at a time, letting each addition melt fully before adding more. Stir in Dijon mustard, garlic powder, smoked paprika, salt, and pepper.
- Combine and serve. Add the drained pasta to the cheese sauce and stir well to coat. If the sauce is too thick, add reserved pasta water a tablespoon at a time. Serve immediately.
Notes
Always grate your own cheese from a block — pre-shredded cheeses contain anti-caking agents that prevent smooth melting. Gluten-free pasta absorbs sauce quickly, so serve right away or keep warm on low heat with a splash of milk.
