My sister-in-law made this for a family gathering and it completely stole the show. Just 4 ingredients for the most comforting dish ever!

This oven baked 4-ingredient bacon and cheese macaroni casserole is exactly the kind of dish that quietly arrives at a family gathering and then completely steals the show. My sister-in-law brought a version of this to a holiday potluck years ago, and it was the one pan everyone kept circling back to for “just one more scoop.” It’s built on pantry staples—dry macaroni, milk, sharp cheddar, and smoky bacon—and relies on slow baking to create its own sauce in the oven. No roux, no separate pot for cheese sauce, just honest, Midwestern-style comfort food that feels right at home on a busy weeknight or a big family table.

Serve this casserole straight from the oven while the edges are bubbling and the bacon on top is crisp. It’s rich and salty, so it pairs nicely with something fresh and bright: a simple green salad with a tangy vinaigrette, steamed green beans with lemon, or roasted broccoli. For a heartier spread, round it out with sliced tomatoes, crusty bread, or a tray of roasted vegetables. If you’re serving a crowd, this works beautifully alongside roasted chicken, meatloaf, or a simple baked ham.

Servings: 6-8

8 ounces dry elbow macaroni (about 2 cups)

Preheat your oven to 350°F (175°C). Lightly grease a 2-quart (or similar size) white casserole dish.

Spread the dry elbow macaroni evenly in the bottom of the prepared casserole dish. The pasta goes in uncooked; it will soften as it bakes in the milk.

Sprinkle 2 cups of the shredded sharp cheddar cheese evenly over the dry macaroni, making sure it’s fairly well distributed so every scoop is cheesy.

Scatter about two-thirds of the crumbled bacon over the cheese layer, reserving the remaining bacon for topping at the end. This gives you bacon flavor throughout the casserole, not just on top.

Slowly pour the whole milk over the macaroni, cheese, and bacon, tilting the dish gently if needed so the milk settles down into the pasta. The milk should just come up around the level of the macaroni and cheese.

Cover the casserole dish tightly with foil. Bake, covered, for 35–40 minutes, until the macaroni is tender when you taste a piece from the center. Ovens vary, so check around the 30-minute mark and give it a gentle stir if the top looks dry.

Carefully remove the foil. Sprinkle the remaining 1 cup shredded cheddar cheese evenly over the top of the casserole, then finish with the remaining crumbled bacon scattered across the surface.

Return the casserole to the oven, uncovered, and bake for another 10–15 minutes, until the cheese on top is fully melted, bubbling at the edges, and the bacon is crisp. If you like extra browning, you can broil for 1–2 minutes at the end, watching closely so it doesn’t burn.

Let the casserole rest for at least 5–10 minutes before serving. This short rest helps the creamy sauce thicken slightly so the scoops hold together, while still staying wonderfully gooey around the edges.

If you’d like a little more character without adding new ingredients, play with the bacon: use applewood-smoked for a sweeter note or peppered bacon for a gentle kick. You can also mix mild and sharp cheddar within the same total amount to balance meltability and tang. For a slightly firmer, more sliceable casserole, reduce the milk to 2 1/2 cups; for extra saucy, increase it to 3 1/2 cups, understanding it will be looser when hot. If you need to make this ahead, assemble the dish up through adding the milk, cover, and refrigerate up to 4 hours; add 5–10 minutes to the covered baking time since it will be starting cold. Food safety tips: cook the bacon thoroughly until crisp and drain off excess fat; avoid using partially cooked bacon that’s been sitting at room temperature. Keep the cooked casserole out at room temperature for no more than 2 hours before refrigerating leftovers in shallow containers. Reheat leftovers to at least 165°F (74°C) before serving, and use refrigerated leftovers within 3–4 days. If reheating in the oven, cover loosely with foil and add a splash of milk to keep the macaroni from drying out.