This slow cooker pasta casserole is one of those dependable potluck recipes that earns a permanent place in the family binder. With just five ingredients, it turns pantry basics into a rich, creamy, crowd-pleasing dinner that feels nostalgic in the best way. I love recipes like this for busy weeknights because the prep is simple, the slow cooker does the heavy lifting, and the final dish has those cozy layered bites of spaghetti, meat sauce, cream cheese, and melted mozzarella everyone goes back for.
Serve it with garlic bread, a crisp green salad, or simple roasted green beans to balance the richness. If you are taking it to a gathering, it also pairs well with fruit salad, iced tea, and easy potluck sides like deviled eggs or a veggie tray since the pasta itself is hearty and filling.
Slow Cooker 5-Ingredient Million Dollar Spaghetti
Servings: 8
Ingredients
1 pound dry spaghetti, broken in half
1 pound raw ground beef
1 jar (24 ounces) marinara sauce
8 ounces cream cheese, cut into cubes or dollops
2 cups shredded mozzarella cheese
1/2 cup water
Directions
1. In a large skillet over medium heat, cook the ground beef until fully browned, breaking it into crumbles as it cooks. Drain any excess grease, then stir in the marinara sauce.
2. Lightly grease the inside of the slow cooker crock. Spread a thin layer of the beef and sauce mixture on the bottom.
3. Add half of the broken dry spaghetti in an even layer. Spoon over some of the beef and sauce mixture, then add half of the cream cheese in small dollops across the top.
4. Repeat with the remaining spaghetti, the rest of the beef and sauce mixture, and the remaining cream cheese. Pour the 1/2 cup water evenly over the top, then press the spaghetti fully under the sauce so every strand is coated and submerged as much as possible.
5. Cover and cook on low for 2 1/2 to 3 hours, just until the pasta is tender. Avoid overcooking, because the spaghetti can turn mushy if left too long.
6. Sprinkle the mozzarella evenly over the top, cover again, and cook for 15 more minutes, or until the cheese is melted and bubbly. Let it rest for 10 minutes before serving.
Variations & Tips
Make-ahead tip: Brown the beef and mix it with the marinara up to a day in advance, then refrigerate. When you are ready to cook, layer everything in the slow cooker and continue as directed for an easier afternoon prep.
Cream cheese tip: If your cream cheese is very cold, cut it into smaller cubes or let it sit at room temperature for 15 to 20 minutes first. That helps it melt into creamy pockets more evenly throughout the casserole.
Pasta texture tip: The biggest key with this recipe is making sure the spaghetti is pushed under the sauce before cooking. Any noodles sticking up too much can stay firm, while extra time in the cooker can quickly take the whole dish from tender to too soft.
Flavor variation: Use Italian-seasoned marinara or add a pinch of garlic powder, dried basil, or red pepper flakes to the meat sauce if you want a little extra flavor without changing the simplicity of the recipe.
Cheese variation: For an even richer top, swap part of the mozzarella for an Italian cheese blend. It melts beautifully and gives the finished casserole a slightly sharper, more savory flavor.