Oven-Baked 5-Ingredient Memorial Day Cookout Casserole

This oven-baked casserole is the kind of thing you slide into the oven before guests arrive and pull out golden and bubbling just in time — no grilling required. Five pantry-friendly ingredients, one dish, and those caramelized edges that make everyone want to scrape the pan. It’s creamy, Cheesy, a little smoky from the baked beans, and completely addictive. The kind of secret side dish that always comes home in an empty dish.

Why You’ll Love This

• Only 5 ingredients — baked beans, ground beef, barbecue sauce, cheddar, and frozen tater tots. That’s it.
• One baking dish, minimal cleanup — everything goes straight into a 9×13 and into the oven.
• Feeds a crowd — makes 8 hearty servings and holds up well on a buffet table.
• Make-ahead friendly — assemble it the night before and bake it straight from the fridge.
• Crispy, cheesy, caramelized edges — the kind people hover around waiting for.

A Word on the Ingredients

Baked beans: I use Bush’s in the tomato sauce, two big cans. If you want to use the maple and brown sugar variety you can, but it gets quite sweet — not bad, just a different thing. Don’t drain them. The sauce is part of the whole deal.

Ground beef: 80/85% lean is what I use and I’d stick with it. Leaner ground beef cooks up drier and you want a little bit of fat in there to blend with the beans. That said, I have made this with ground turkey when that’s what I had, and my family didn’t complain, which is the highest praise they give.

Barbecue sauce: A cup of whatever you have. I tend toward something smoky over something overly sweet, but this is purely personal. I once used a spicy mango variety by mistake (grabbed the wrong bottle, didn’t check) and it was actually really good? So there’s some flexibility here.

Sharp cheddar: Shred it yourself if you can. The pre-shredded bags have a coating that makes them melt a little differently. But honestly I use the bag half the time because that’s what’s in the fridge and nobody’s ever complained.

Frozen tater tots: One whole 16-ounce bag, and no, you don’t thaw them. Don’t thaw them. Put them on frozen, directly from the bag, in a single layer. They’ll crisp up perfectly in the oven. If you’ve already thawed them for some reason, they’ll still work but they’ll be a bit softer on the bottom.

Ingredients

• 2 (28-ounce) cans baked beans in tomato sauce — do not drain
• 1 pound ground beef (80–85% lean)
• 1 cup barbecue sauce
• 2 cups shredded sharp cheddar cheese, divided (1 cup + 1 cup)
• 1 (16-ounce) bag frozen tater tots

How to Make It

Preheat and prep: Preheat your oven to 375°F and lightly grease a 9×13-inch baking dish. Nothing fancy. I use a big ceramic one I’ve had since my oldest was born — it’s a little chipped on one corner and I refuse to throw it out.

Brown the beef: Brown the ground beef in a skillet over medium-high, breaking it up as it cooks. This takes about six to eight minutes, give or take. Drain the fat — just tip the skillet and spoon it off, or use paper towels to blot. If you skip this step the whole casserole gets greasy underneath, which I learned the hard way the first time I made it on my own without anyone watching over my shoulder.

Mix the base: Pour the baked beans directly into your casserole dish. Add the cooked beef. Pour in the barbecue sauce. Stir it all together until everything is evenly mixed and spread it out into a flat, even layer. It’ll look like a lot. That’s fine.

Add cheese and tots: Scatter 1 cup of the shredded cheddar over the top. Then arrange the frozen tater tots in a single layer over everything. Cover the surface completely — don’t leave gaps, because the cheese underneath will bubble up and burn in the open spots. Ask me how I know.

Bake: Bake uncovered for 35 to 40 minutes. You’re looking for golden, crispy tots on top and bubbling, caramelized edges.

The final cheese melt: When it comes out of the oven the first time, sprinkle the second cup of cheddar over the tots and put it back in for another five to ten minutes, just to melt.

Rest and serve: Let it rest — and I mean it — for at least ten minutes before you serve it. It needs a few minutes to settle or you’ll be serving bean soup, more or less.

Variations

Half pepper jack, half sharp cheddar is genuinely delicious if you want a little heat. A diced onion and bell pepper sautéed with the beef is also really good — I just often forget to add them and it never seems like anything is missing.

If you want to make this ahead — which I’ve done for basically every large gathering I’ve hosted in the last decade — you can assemble the whole thing up through the tater tot layer, cover it tightly with foil, and refrigerate it for up to a day. Pull it out while the oven heats, bake it uncovered, and add five or ten extra minutes to the first bake time since everything will be cold from the fridge.

I tried a fully vegetarian version once with plant-based crumbles and it was perfectly fine. Didn’t quite have the same richness, but the beans carry a lot of the weight on their own so it still worked.

Storage & Leftovers

Leftovers reheat really nicely. Cover the dish and refrigerate — it keeps for three or four days easily, maybe a little longer but I’ve never pushed it past four because it’s usually gone. To reheat, I either put a portion in a skillet over low heat with a splash of water and cover it, or I do individual servings in the microwave, which softens the tots but I don’t really mind at that point. The flavor actually gets better on day two. I don’t know why. It just does.

Food safety note: Don’t leave this sitting out for more than two hours at room temperature, especially in summer heat when you’re eating outside. I’ve gotten a little loose with this rule at backyard cookouts before and I shouldn’t have. Just put it back inside or pack it up.

One more thing — this is the kind of dish that looks a little humble when you’re putting it together. Raw tots on top of beans and beef in a baking dish doesn’t inspire a lot of confidence. But every single time I’ve pulled it out of the oven, golden and bubbling and smelling like everything good about summer, someone standing nearby has gone oh — like they weren’t expecting it.