Slow Cooker Ravioli Lasagna Recipe

Introduction

This slow cooker ravioli lasagna is the ultimate set-it-and-forget-it comfort food. By using frozen ravioli as both your pasta and cheesy layers, you skip all the tedious assembly of traditional lasagna. You end up with a rich, bubbly, and incredibly satisfying dish with minimal effort.

Prep & Cook Time

• Prep Time: 20 minutes
• Cook Time: 240 minutes (4 hours)
• Total Time: 260 minutes
• Servings: 5

Ingredients

• 1 lb. ground beef ((can use mild sausage))
• 1 cup white onion (diced)
• 1/2 tsp. salt
• 1/4 tsp. pepper
• 1/4 tsp. garlic powder
• 1/2 tsp. dried leaf oregano ((not ground))
• 24 oz. marinara sauce ((such as Rao's))
• 8 oz. shredded mozzarella cheese ((2 cups))

Instructions

1. In a large skillet over medium-high heat, brown the ground beef with the diced onion. Cook until the beef is no longer pink and the onion is softened, about 8-10 minutes. Drain any excess fat.
2. Return the skillet to the heat. Stir in the salt, pepper, garlic powder, and dried leaf oregano. Add the marinara sauce and mix well to combine. Bring to a simmer, then remove from heat.
3. Lightly grease the insert of a 5-6 quart slow cooker.
4. Spread about 1 cup of the meat sauce mixture evenly over the bottom of the slow cooker.
5. Arrange half of the frozen ravioli (still frozen) in a single layer over the sauce.
6. Spoon half of the remaining meat sauce over the ravioli layer, spreading gently to cover.
7. Sprinkle 1 cup of the shredded mozzarella cheese evenly over the sauce.
8. Repeat the layers: remaining frozen ravioli, remaining meat sauce, and finally the remaining 1 cup of mozzarella cheese.
9. Cover and cook on LOW for 4 hours. The lasagna is done when it is hot and bubbly throughout and the ravioli are tender.
10. Let the lasagna sit, uncovered, for 10-15 minutes before serving to allow it to set slightly.

Variations

• Vegetable-Packed: Lightly sauté chopped mushrooms, zucchini, or spinach and add them to the meat sauce layer for extra vegetables.
• Crispy Topping: For a textural contrast, transfer the finished lasagna to a broiler-safe dish, sprinkle with a bit of extra cheese or breadcrumbs, and broil for 2-3 minutes for a crispier top.
• Spicy Kick: Add a pinch of red pepper flakes to the meat mixture while browning for a touch of heat.
• Layered Salad Pairing: Serve individual portions on a bed of fresh arugula tossed lightly with lemon juice and olive oil for a bright, fresh contrast.

Tips for Success

• Even Layers: Try to keep the ravioli in a single, even layer without too much overlapping for more consistent cooking.
• Low & Slow is Key: Stick to the LOW setting. Cooking on HIGH can cause the edges to burn and the center to be undercooked.
• Let it Rest: The 10-15 minute rest after cooking allows the cheese to set a bit, making it much easier to scoop out neat servings.

Storage & Reheating

Store cooled leftovers in an airtight container in the refrigerator for up to 4 days. Reheat individual portions in the microwave, or reheat larger amounts in a covered oven-safe dish at 350°F until warmed through.

FAQ

Can I use a different meat?

Yes, the recipe note suggests mild sausage as a direct substitute for the ground beef, or you could use ground turkey or chicken.

Do I really cook it for only 4 hours on low?

Yes, this is a shorter slow cooker recipe. Four hours on LOW is sufficient because the ravioli are small and cook relatively quickly. Longer times can lead to overcooking.

Can I prepare the layers ahead of time?

You can brown the meat and mix the sauce a day ahead. Store it covered in the fridge, then assemble the layers in the slow cooker when you’re ready to cook.

Why can’t I use ground oregano?

Dried leaf oregano holds its flavor better during long cooking. Ground oregano can become bitter and its fine powder can create an unpleasant texture.

My slow cooker runs hot. What should I do?

If you know your appliance runs hot, check the lasagna at the 3.5-hour mark. It’s done when bubbly and the pasta is tender.

Can I double this recipe?

For a larger crowd, this recipe can be doubled in a 7-quart or larger slow cooker. You may need to add 30-60 minutes to the cook time.