
Creamy, cheesy, and deeply comforting, this Instant Pot mac and cheese comes together in under 30 minutes and serves four hungry people without a single compromise on flavor. The combination of sharp cheddar, nutty Gruyère, and velvety cream cheese creates a sauce that clings to every piece of pasta — rich, smooth, and absolutely indulgent. Dry mustard, garlic powder, and onion powder do quiet but important work in the background, giving the dish that classic depth you'd expect from a slow-cooked stovetop version. The Instant Pot is genuinely brilliant here because it cooks the pasta directly in seasoned chicken broth, so the starchy liquid left behind helps bind the sauce naturally — no roux, no flour, no thickeners needed. That matters a lot when you're cooking without gluten, since so many boxed and restaurant versions sneak wheat into the sauce itself. Using a dedicated gluten-free elbow pasta and building everything from scratch in one pot keeps cross-contact concerns to a minimum. Serve it straight from the pot while the sauce is at its silkiest, and keep a splash of warm milk nearby in case it thickens up before everyone gets to the table.
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Add the gluten free elbow pasta, chicken broth, water, dry mustard, garlic powder, onion powder, salt, and black pepper to the Instant Pot insert. Stir briefly to distribute the seasonings. The liquid should just cover the pasta; press the pasta down if needed.
Secure the lid and set the valve to Sealing. Cook on Manual (High Pressure) for 4 minutes. When the cook time ends, carefully perform a quick release by switching the valve to Venting — stand back, as steam will release forcefully.
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