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Slow Cooker Cheesy Beef Spaghetti

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Slow Cooker Cheesy Beef Spaghetti

Description

This Slow Cooker Cheesy Beef Spaghetti is the kind of hearty comfort food that makes an easy family dinner feel extra special. Tender spaghetti noodles are combined with seasoned ground beef, juicy tomatoes, green bell peppers, savory tomato sauce, and plenty of melted cheese for a rich, satisfying meal. Cooking the beef sauce slowly allows the tomatoes, vegetables, garlic, and seasonings to develop a deeper flavor while requiring very little hands-on work. The cheese is added near the end, creating a creamy, slightly cheesy sauce that coats every strand of spaghetti. It’s perfect for busy weeknights, casual gatherings, potlucks, or weekends when you want something warm and filling without spending hours standing over the stove. Serve it straight from the slow cooker with garlic bread and a simple salad for a complete crowd-pleasing dinner.

Ingredients For the Beef Sauce

  • 1½ lbs lean ground beef
  • 1 medium yellow onion, diced
  • 1 green bell pepper, diced
  • 3 garlic cloves, minced
  • 1 can (28 oz) crushed tomatoes
  • 1 can (14.5 oz) diced tomatoes, undrained
  • 1 can (15 oz) tomato sauce
  • 2 tbsp tomato paste
  • 1 tsp Italian seasoning
  • 1 tsp dried oregano
  • 1 tsp dried basil
  • ½ tsp paprika
  • ½ tsp salt
  • ½ tsp black pepper
  • ¼ tsp crushed red pepper flakes, optional
  • ½ cup beef broth

For the Pasta & Cheese

  • 12 oz spaghetti
  • 1½ cups shredded mozzarella cheese
  • 1 cup shredded cheddar cheese
  • ½ cup grated Parmesan cheese

Optional Garnish

  • Fresh parsley
  • Fresh basil
  • Extra Parmesan cheese
  • Crushed red pepper flakes

Step-by-Step Instructions

  1. Heat a large skillet over medium-high heat. Add the ground beef and cook for 6–8 minutes, breaking it into small crumbles until completely browned.
  2. Drain excess grease from the beef.
  3. Add the diced onion and green bell pepper and cook for another 3–4 minutes until they begin to soften.
  4. Stir in the minced garlic and cook for about 30 seconds until fragrant.
  5. Transfer the beef and vegetable mixture to the slow cooker.
  6. Add crushed tomatoes, diced tomatoes, tomato sauce, tomato paste, Italian seasoning, oregano, basil, paprika, salt, black pepper, red pepper flakes, and beef broth.
  7. Stir everything together until evenly combined.
  8. Cover and cook on LOW for 5–6 hours or HIGH for 2½–3 hours.
  9. About 30 minutes before serving, cook the spaghetti on the stovetop according to package directions until just al dente. Drain well.
  10. Add the cooked spaghetti to the slow cooker and gently toss until every strand is coated in the beef sauce.
  11. Add mozzarella, cheddar, and Parmesan cheese.
  12. Stir gently until the cheeses begin to melt throughout the spaghetti.
  13. Cover and cook on LOW for another 15–20 minutes, just until everything is hot and the cheese has melted.
  14. Taste and adjust the salt and pepper if necessary.
  15. Garnish with fresh parsley, basil, or additional Parmesan and serve immediately.

Tips

  • Cook the spaghetti only until al dente because it will soften slightly after being added to the slow cooker.
  • Use lean ground beef to prevent the finished sauce from becoming greasy.
  • Freshly shredded cheese melts more smoothly than packaged pre-shredded cheese.
  • For additional vegetables, add mushrooms, zucchini, or red bell peppers.
  • Want it spicier? Increase the crushed red pepper flakes or add a pinch of cayenne.
  • Don’t leave the cooked pasta in the slow cooker for several hours because it can become overly soft.
  • Ground turkey can replace ground beef for a lighter variation.

Notes

Store leftovers in an airtight container in the refrigerator for up to 4 days. Reheat individual portions in the microwave or gently on the stovetop. Add a small splash of tomato sauce or broth when reheating if the pasta has absorbed too much sauce. The beef sauce can be frozen separately for up to 3 months. For the best texture, prepare fresh spaghetti when you’re ready to serve the frozen sauce.

Q&A

Can I put uncooked spaghetti directly into the slow cooker?
It’s possible with specially tested recipes, but for this version, cooking the spaghetti separately provides much more reliable texture and prevents the noodles from becoming mushy.
Can I use another type of pasta?
Yes. Penne, rigatoni, rotini, or linguine can all work. Cook the pasta until al dente before adding it to the sauce.
Can I prepare the beef sauce ahead of time?
Absolutely. Prepare the sauce a day ahead, refrigerate it, and reheat it in the slow cooker before adding freshly cooked pasta and cheese.
What goes well with Cheesy Beef Spaghetti?
Garlic bread, Caesar salad, roasted broccoli, green beans, or a simple garden salad are excellent choices.

Servings

Serves 6–8

Nutrition (Approx. Per Serving, Based on 8 Servings)

  • Calories: 510
  • Protein: 32g
  • Carbohydrates: 48g
  • Fat: 22g
  • Saturated Fat: 10g
  • Fiber: 5g
  • Sugar: 9g
  • Sodium: 760mg
  • Cholesterol: 75mg
  • Calcium: 25% DV
  • Iron: 20% DV
    Nutritional values are estimates and will vary depending on the brands and exact quantities used.

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