Step-by-Step Instructions
Step 1 — Preheat and Prep
Set your oven to 375°F (190°C) and allow it to preheat fully while you work through the stovetop steps. Lightly grease a 9×13-inch baking dish with butter or nonstick spray and set it aside.
Step 2 — Cook the Pasta
Bring a large pot of well-salted water to a rolling boil. Add the elbow macaroni and cook for 1 minute less than the package directions indicate — you want the pasta to be just barely tender with a noticeable firmness still at the center. It will continue cooking in the oven, so pulling it out slightly early is the key to avoiding a mushy final texture. Drain well and set aside.
Step 3 — Brown the Ground Beef
In a large, deep skillet or Dutch oven over medium heat, add the ground beef and cook, breaking it apart continuously with a wooden spoon, for 6 to 8 minutes until completely browned with no pink remaining. Drain off any excess fat, leaving just a thin layer in the pan to cook the aromatics.
Step 4 — Add the Aromatics
Add the finely diced onion to the skillet and cook, stirring occasionally, for 3 to 4 minutes until the onion has softened and turned translucent. Add the minced garlic and cook for another 30 seconds, stirring constantly, until fragrant. The combination of onion and garlic cooked in the beef fat creates the aromatic base that runs through every bite of the finished casserole.
Step 5 — Build the Chili Base
Add the drained kidney beans, diced tomatoes with their juices, tomato sauce, and tomato paste to the skillet. Stir in the chili powder, cumin, paprika, oregano, salt, black pepper, and cayenne if using. Stir everything together until fully combined, then bring the mixture to a gentle simmer. Cook uncovered for 8 to 10 minutes, stirring occasionally, until the sauce has reduced slightly and thickened enough to coat a spoon without being watery. Taste and adjust the salt and spice levels as needed — this is the point where you dial in the flavor before it goes into the baking dish.
Step 6 — Combine Pasta and Chili
Add the drained, par-cooked macaroni directly to the skillet with the chili mixture. Fold everything together gently until the pasta is thoroughly and evenly coated with the sauce. Every piece of pasta should be well covered — if the mixture looks dry, add a small splash of water or chicken broth to loosen it slightly. The mixture should look saucy but not soupy.
Step 7 — Layer and Top with Cheese
Pour approximately half of the pasta and chili mixture into the prepared baking dish and spread it into an even layer. Scatter half of the shredded cheddar cheese evenly across this first layer. Add the remaining pasta mixture on top and spread it out evenly. Finish with the remaining cheddar and the mozzarella or Monterey Jack if using, covering the surface of the casserole completely for maximum cheesy coverage.
Step 8 — Bake Until Bubbly
Place the baking dish in the preheated oven and bake uncovered for 15 to 20 minutes, until the cheese on top is fully melted, bubbling around the edges, and beginning to turn golden in spots. The casserole should look gloriously molten and fragrant when it comes out. If you want an even more golden, slightly caramelized cheese top, switch the oven to broil for the final 2 to 3 minutes — but watch it closely, as cheese can go from golden to burned quickly.
Step 9 — Rest Before Serving
Remove the casserole from the oven and let it rest for 5 to 10 minutes before serving. This brief rest allows the sauce to thicken slightly, the cheese to set just enough to hold its shape, and the internal temperature to distribute evenly so every serving is consistently hot. Scatter chopped fresh parsley over the top just before bringing it to the table for a fresh, bright finish.
Frequently Asked Questions
Can I make this casserole ahead of time?
Yes, and it’s one of the most convenient things about this recipe. Assemble the casserole completely through the cheese-topping step, cover the baking dish tightly with plastic wrap or foil, and refrigerate for up to 24 hours before baking. When you’re ready, remove the covering and bake as directed, adding 5 to 10 extra minutes to the bake time if the dish is going straight from a cold refrigerator into the oven.
Can I freeze it?
Absolutely. This casserole freezes well both before and after baking. Wrap the dish tightly with a layer of plastic wrap followed by aluminum foil to prevent freezer burn, and freeze for up to 3 months. Thaw overnight in the refrigerator before baking or reheating. The texture of the pasta will be slightly softer after freezing and thawing, which some people actually prefer in a baked casserole.
How do I make a low-carb version?
Substitute the elbow macaroni with cooked cauliflower florets cut into small, pasta-sized pieces. Reduce the tomato sauce by a small amount to compensate for the extra moisture that cauliflower releases during baking. The result is a genuinely satisfying low-carb version that keeps all the bold chili flavor intact.
What’s the best cheese to use?
Sharp cheddar is the classic and most flavorful choice — its tangy, pronounced flavor stands up well against the bold chili spices. Monterey Jack adds creaminess and excellent melt. Colby Jack is a good middle ground. Pepper jack is a great option if you want to amplify the heat of the dish. The key is to shred the cheese fresh from the block rather than using pre-shredded bags, which tend to contain additives that prevent clean melting.
Can I add beans if the original recipe doesn’t include them?
The recipe already includes kidney beans, but you can absolutely add more variety. Black beans and kidney beans together create a heartier, more traditional chili character. Pinto beans are another excellent option. For the beefiest, least beany version of this dish, simply leave them out entirely — the casserole is still deeply satisfying without them.
How do I make it spicier?
Several options work here. Increase the chili powder, add more cayenne, or stir diced fresh jalapeños into the chili base during cooking. Pepper jack cheese on top instead of cheddar adds additional heat. A few dashes of your favorite hot sauce stirred into the chili mixture before combining with the pasta is another reliable approach that adds heat without significantly changing the flavor profile.
Variations Worth Trying
Spicy jalapeño chili mac: Dice 1 to 2 fresh jalapeños and add them to the skillet with the onion. Finish with pepper jack cheese instead of — or in addition to — the cheddar on top. Each bite has a clean, bright heat that builds pleasantly.
Extra bean version: Use both kidney beans and black beans for a more substantial, fiber-rich casserole that feels closer to a classic bowl of chili in every bite. Great for feeding vegetarians if you swap the beef for a plant-based alternative or omit it entirely.
Turkey chili mac: Ground turkey produces a noticeably lighter casserole that still carries the full chili flavor beautifully. Season it a touch more generously than you would the beef, as turkey is milder and benefits from a little extra spice.
Tex-Mex style: Stir a cup of frozen sweet corn into the chili mixture, replace the chili powder with taco seasoning, and scatter a generous handful of crushed tortilla chips across the cheese layer before baking. The chips toast in the oven and add a satisfying crunch that makes every bite more interesting.
Ultra-creamy version: Stir 4 ounces of softened cream cheese into the chili mixture just before combining it with the pasta. It melts in smoothly and gives the sauce a rich, almost mac-and-cheese-like creaminess that makes the finished casserole feel luxuriously indulgent.
Low carb version: Swap the macaroni for small cauliflower florets that have been lightly steamed or roasted first. The cauliflower absorbs the chili sauce wonderfully and the finished dish is deeply satisfying while being considerably lower in carbohydrates.
What to Serve Alongside
This casserole is a complete, hearty meal entirely on its own, but a simple side rounds out the plate nicely. Warm cornbread is the most natural accompaniment — its mild sweetness plays perfectly against the bold chili spices, and it’s ideal for soaking up any extra sauce. Garlic bread or soft dinner rolls work equally well for the same reason. A crisp green salad with a bright vinaigrette cuts through the richness beautifully and adds freshness to what is otherwise a very comforting, warming meal. For gatherings, a simple coleslaw or roasted vegetable platter alongside makes the spread feel balanced and complete.
Storage and Reheating
Let the casserole cool to room temperature before covering and storing. Leftovers keep well in an airtight container in the refrigerator for up to 4 days — the flavors actually deepen and improve overnight as everything melds together. For individual portions, reheat in the microwave in one-minute intervals, stirring between each. For larger portions, cover the baking dish with foil and warm in a 350°F oven until heated through, adding a small splash of broth or water if the pasta has absorbed too much of the sauce during storage. For freezing, wrap tightly and freeze for up to 3 months, thawing completely in the refrigerator overnight before reheating.
A Casserole Worth Coming Back To
Baked Chili Mac Casserole occupies a rare and valuable space in the dinner repertoire: it’s a recipe that’s genuinely easy to make, genuinely satisfying to eat, and genuinely loved by everyone who sits down to it. The bold, spiced chili base, the tender pasta, the layers of melted cheese, the satisfying heft of it all — this is comfort food that delivers every single time. Make it once, and it earns a permanent spot in your rotation.
Enjoy!
