This Slow Cooker Cowboy Casserole is a cozy, family-friendly meal made with simple pantry staples. Layers of seasoned ground beef, tender sliced potatoes, creamy sauce, and melted Cheddar cheese come together effortlessly in the slow cooker. It’s budget-friendly, filling, and perfect for busy days when you want comfort food without extra work.
1 pound lean ground beef
½ cup chopped onion
2 garlic cloves, pressed or minced
1 can condensed cream of mushroom soup
1 cup milk
4 cups potatoes, peeled and thinly sliced
2 cups shredded Cheddar cheese
Salt and freshly ground black pepper, to taste
Cook the Beef
In a skillet over medium heat, cook the ground beef and onion until the beef is browned and the onion is soft, about 6–7 minutes. Add garlic and cook for 1 minute until fragrant. Season with salt and pepper.
Prepare the Sauce
In a bowl, stir together the cream of mushroom soup and milk until smooth.
Layer the Casserole
Line the slow cooker with a liner or lightly grease it.
Add a layer of sliced potatoes to the bottom, overlapping slightly. Season with salt and pepper.
Top with a layer of ground beef, a layer of soup mixture, and 1 cup of shredded cheese.
Repeat layers with remaining ingredients, finishing with cheese on top.
Slow Cook
Cover and cook on High for 3–4 hours, or until the potatoes are fork-tender and the cheese is melted.
Serve
Spoon onto plates and serve hot.
Slice potatoes evenly so they cook at the same rate.
For extra flavor, add a pinch of paprika or dried thyme to the beef.
You can swap cream of mushroom soup for cream of chicken if preferred.
Let the casserole rest for 5–10 minutes before serving to help it set.