Name: Cowboy Casserole
Prep time: 25 min
Cook time: 20 min
Total time: 45 min
Ingredients: 32 ounces frozen tater tots ((one 32-ounce bag)); 1 pound ground beef ((97%-3% blend used)); ½ cup yellow onion, (diced ); 10 ounces Rotel brand diced tomatoes with green chilies, (undrained (one 10-ounce can)); 1 teaspoon garlic powder; 1 teaspoon onion powder; 1 teaspoon salt; ½ teaspoon ground black pepper; 11 ounces Mexican-style corn, (drained (one 11-ounce can)); 10.5 ounces condensed cream of mushroom soup, (undiluted (one 10.5-ounce can)); 1 cup sour cream; 1½ cups shredded colby-jack cheese, (divided); 2 teaspoons chopped fresh chives, (garnish)

Cowboy casserole is what to make when you’ve thawed a pound of ground beef and haven’t thought much further than that.

A bag of tater tots helps turn it into a dinner worth looking forward to. They bake golden over a creamy beef filling with corn and Rotel tomatoes, with melted cheese across the top. You get crisp potatoes and plenty of savory filling in the same spoonful, and a whole supper to put on the table.

A plate of cowboy casserole served with a fork, on a wooden table beside a napkin, pepper, extra chives and a glass of ice water.

Give The Tots A Head Start

Frozen tater tots need more time in the oven than the filling does, so I give them 10 minutes on their own before anything goes into the baking dish. I spread them straight from the bag onto a foil-lined baking sheet in a single layer, with no thawing, and bake them at 425°F while I start the beef. When they come out, I turn the oven down to 400°F for the casserole.

Take the tots out after 10 minutes and set them aside while you finish the filling. They’ll brown the rest of the way on top of the casserole. That head start, along with a filling that goes into the dish warm from the skillet, is why the casserole only needs 20 minutes in the oven once the tots are on.

Drain The Beef, Even When It’s Lean

I use 97/3 lean ground beef and cook it with the diced onion until there’s no pink left and the onion is soft. Even beef that lean left fat in the skillet, so I drain it every time. If you’re using 80/20, there will be a lot more to pour off because leaving it in makes the filling greasy and heavy.

Drain the beef before the Rotel goes in, whatever blend you buy.

Ground beef, diced onion, Rotel tomatoes and seasonings in a stainless steel skillet on a wooden surface, before cooking.

With the beef drained, I add the Rotel with its juice (don’t drain it), along with the garlic powder, onion powder, salt and pepper. I season it here rather than on the raw beef, because any salt on the beef would have gone out with the fat.

The Corn And Tomatoes Bring More Flavor

I use Rotel tomatoes and Mexican-style corn in the filling. The tomatoes include green chilies, and the corn adds more flavor than plain sweet corn, which matters in a casserole with this much sour cream, soup and cheese.

I had my independent recipe tester, Teresia, make this recipe in June 2026. Her family found the earlier version bland, so I added salt, increased the pepper and replaced the plain corn with Mexican-style corn.

Cooked ground beef in a skillet on a wood surface, with corn, shredded cheese, sour cream and cream of mushroom soup added and not yet stirred in.

If plain corn is what you have, you can use drained canned sweet corn or 1 to 1¼ cups of thawed frozen corn. You’ll lose some of the flavor from the Mexican-style corn, but keep the rest of the seasonings as written.

A hand stirs the ground beef, corn, soup and sour cream together in a large skillet on a wooden surface.

If You Would Rather Use A Different Soup

Cream of mushroom soup is what I use. If mushrooms aren’t welcome at your table, cream of chicken, celery or cheddar can all be substituted.

Use the same size can and add it straight in without any milk or water. Any extra liquid would thin out the filling.

Press The Tots In And Bake It Uncovered

Spread the warm filling in a 9×13 baking dish and scatter ½ cup of cheese over it.

Set the tots on top in a single layer and press each one in lightly, so they stay put when you scoop out a serving. The last ½ cup of cheese goes over the tots.

A glass baking dish on a wooden surface holding the cowboy casserole filling topped with shredded cheese, with a row of tater tots laid over one third of the dish.

Bake it uncovered! When I updated this recipe in July 2026, I stopped covering the casserole with foil. The foil was trapping steam and softening the potatoes. Leaving it off lets the top crisp while the filling heats through.

After 20 minutes at 400°F the tots are golden, the cheese has melted, and the filling is bubbling around the edges of the dish, which tells you it’s hot all the way through. I don’t leave it in longer to get the tots darker, because the thin layer of cheese on top would burn.

The bottoms of the tots soften a little where they sit in the hot filling, and the tops stay crisp. I let the casserole rest for three to five minutes, then sprinkle the chives over it. They go on after baking because they’d scorch in the oven.

A baked cowboy casserole in a glass dish topped with melted cheese and chopped chives, on a wooden table next to drinks, plates and seasonings.

Reheat Leftovers In The Oven

Cowboy casserole is at its best the day you bake it, since the tots soften as it sits. Let any leftovers cool completely, cover the dish with foil, and keep it in the refrigerator for up to two days.

Reheat leftovers in a 350°F oven for 15 to 20 minutes. The oven brings back some of the crispness on the tots, which the microwave won’t.

A wooden spoon lifting a serving of cowboy casserole, also known as tater tot hotdish, showing the beef and corn filling under the crisp tater tots and melted cheese.

Freeze The Filling And Add The Tots On Baking Day

For a dinner you can put away for another night, make the beef filling and spread it in a heavy-duty disposable 9×13-inch foil pan. A glass or ceramic dish can crack going straight from the freezer into a hot oven. Add the layer of cheese that goes over the filling, then stop there. Leave the tater tots and the final ½ cup of cheese off.

Once the filling has cooled, cover tightly and freeze for up to two months. Keep the tots frozen separately; there’s no need to give them their first bake when you’re making the filling for the freezer.

If you’re taking this to someone, send the tots and remaining cheese with it, along with the baking directions below. That gives them the whole dinner without any skillet work left to do.

Bake It Straight From Frozen

The frozen casserole has its own baking instructions. The filling needs time to heat before the potatoes go on.

Bake the frozen filling, covered with foil, at 350°F for 75 minutes. The tots stay in the freezer for now.
Remove the foil and increase the oven to 425°F. Arrange the frozen tots over the filling and bake uncovered for 15 minutes.
Add the remaining ½ cup of cheese. Bake for another 10 to 15 minutes, until the tots are golden and the center of the casserole reaches 165°F. Check the temperature in the filling, not just the potato topping.

More Ground Beef Casserole Recipes

Tater tot casserole keeps the tots and the cream of mushroom soup, with cheddar and mixed vegetables in place of the Rotel and corn.
Hamburger tater tot casserole puts green beans and cheddar under the tots.

This post was originally published in July 2021.