This oven baked 4-ingredient sweet potato mac and cheese is a cozy, family-style twist my uncle came up with years ago when he was trying to stretch a box of pasta and a couple of pantry staples into something special. The sweet potato brings a natural sweetness and bright orange color, and when it bakes up over the pasta with plenty of cheese, you get that sweet-and-savory balance that feels like comfort food with just a little extra goodness. It’s simple enough for a busy weeknight, but warm and homey enough to set out in the middle of the table for a Sunday supper.
Serve this sweet potato mac and cheese straight from the cast iron pan while it’s still bubbling and golden on top. It pairs nicely with a simple green salad, roasted broccoli, or steamed green beans to add a bit of crunch and color to the plate. For a heartier meal, you can serve it alongside grilled or baked chicken, pork chops, or even a simple pan-fried sausage. A slice of warm bread or dinner rolls is perfect for scooping up the extra creamy sauce that settles at the bottom of the pan.
Oven Baked 4-Ingredient Sweet Potato Mac and CheeseServings: 6
Ingredients
12 oz dry small shell pasta (or elbow macaroni)
2 medium sweet potatoes (about 1 lb total), peeled and cut into chunks
3 cups whole milk (or 2%)
3 cups shredded sharp cheddar cheese, divided
Directions
Preheat your oven to 375°F (190°C). Lightly grease a 10–12 inch cast iron skillet or similar oven-safe baking dish and set aside.
Bring a large pot of salted water to a boil. Add the shell pasta and cook until just shy of al dente, about 1–2 minutes less than the package directions. Drain well and set aside.
While the pasta water is heating or the pasta is cooking, place the sweet potato chunks in a medium saucepan and cover with water. Bring to a boil, then reduce to a simmer and cook until very tender when pierced with a fork, about 10–12 minutes. Drain the sweet potatoes well.
Return the drained sweet potatoes to the warm pot. Add the milk. Using a potato masher or an immersion blender, mash or blend until the mixture is completely smooth and creamy. This sweet potato-milk blend will be your sauce base.
Stir in 2 1/2 cups of the shredded cheddar cheese into the warm sweet potato mixture, a handful at a time, until the cheese is melted and the sauce is smooth. Taste and, if you like, add a small pinch of salt (optional, not counted as an ingredient) to balance the sweetness.
Add the drained pasta to the pot with the sweet potato cheese sauce. Stir gently until all the shells are well coated and the sauce looks creamy and bright orange.
Pour the sauced pasta into the prepared cast iron skillet, spreading it out evenly. Sprinkle the remaining 1/2 cup shredded cheddar cheese over the top to create a cheesy layer that will crisp and brown in the oven.
Place the skillet on the middle rack and bake for 20–25 minutes, or until the top is bubbly, lightly browned, and just starting to crisp around the edges. If you like a deeper golden crust, you can broil it for 1–2 minutes at the end, watching carefully so it doesn’t burn.
Let the mac and cheese rest for about 5–10 minutes before serving. This helps the sauce thicken slightly and makes it easier to scoop neat portions from the cast iron pan. Serve warm, straight from the skillet, with big spoonfuls of the crispy top and creamy pasta underneath.
Variations & Tips
For picky eaters, you can peel the sweet potatoes very thoroughly and blend the sauce extra smooth so there are no visible bits; most kids will just see the bright orange color and think it’s extra cheesy. If your family prefers a milder flavor, use half sharp cheddar and half mild cheddar, still keeping the overall cheese amount the same. For a slightly richer dish, you can swap 1/2 cup of the milk for half-and-half or cream (still counting it together as the milk ingredient in your kitchen, if you’re not strictly tracking). If you like a little texture on top but want to keep the ingredient list simple, let the cheese on top get nice and dark golden and crispy rather than adding breadcrumbs. To make ahead, assemble the mac and cheese up to the baking step, cover, and refrigerate for up to a day; add a few extra minutes to the bake time if it’s going into the oven cold. Leftovers reheat well in the oven, covered with foil, or in the microwave with a splash of milk stirred in to loosen the sauce.
