Slow Cooker Lasagna Recipe

Introduction

Slow cooker lasagna transforms a classic comfort food into a supremely easy, hands-off meal. You get all the rich, layered flavors of traditional lasagna without the fuss of boiling noodles or monitoring the oven. Just assemble it in the morning, and come home to a perfectly cooked, bubbly Italian feast.

Prep & Cook Time

• Prep Time: 30 minutes
• Cook Time: 4 hours (240 minutes)
• Total Time: 4 hours 30 minutes
• Servings: 10

Ingredients

• non-stick cooking spray
• 16 oz. lasagna noodles ((uncooked) I use Barilla brand – Regular lasagna noodles, not no boil noodles.)
• 1 lb. lean ground beef
• 1 white onion (diced)
• 1 tsp. salt
• ½ tsp. ground pepper
• 2 tsp. Italian seasoning
• ½ tsp. garlic powder
• 48 oz. Rao's Marinara Sauce ((two 24-oz. jars))
• 1 cup water
• 2 large eggs
• 2 cups shredded mozzarella
• 15 oz. whole milk ricotta
• 1 cup shredded parmesan
• ½ tsp. salt
• 1 tsp. dried parsley (or dried oregano or Italian seasoning)
• ½ tsp. garlic powder
• 2 cups mozzarella cheese
• dried parsley for garnish ((optional))

Instructions

1. Spray the inside of a 6-quart or larger slow cooker generously with non-stick cooking spray.
2. In a large skillet over medium-high heat, brown the lean ground beef with the diced onion until the meat is no longer pink and the onion is soft. Drain any excess grease. Stir in the 1 tsp. salt, ½ tsp. pepper, 2 tsp. Italian seasoning, and ½ tsp. garlic powder.
3. Pour the Rao’s Marinara Sauce and 1 cup of water into the skillet with the meat mixture. Stir until well combined and heated through. Remove from heat.
4. In a medium bowl, make the cheese filling by combining the eggs, 2 cups shredded mozzarella, ricotta, parmesan, ½ tsp. salt, 1 tsp. dried parsley, and ½ tsp. garlic powder. Mix until fully incorporated.
5. Spread about 1 ½ cups of the meat sauce mixture onto the bottom of the prepared slow cooker.
6. Layer 4-5 uncooked lasagna noodles over the sauce, breaking them as needed to fit and cover the sauce in a single layer.
7. Dollop half of the ricotta cheese mixture over the noodles and spread it gently into an even layer. Sprinkle with ⅓ of the remaining 2 cups of mozzarella cheese.
8. Spoon about ⅓ of the remaining meat sauce over the cheese layer.
9. Repeat the layers: Noodles, the remaining ricotta mixture, ⅓ of the mozzarella, and ⅓ of the meat sauce.
10. For the final layer, add a last layer of noodles, the remaining meat sauce, and finally, the last ⅓ of the mozzarella cheese.
11. Once cooked, turn off the slow cooker, remove the lid, and let the lasagna rest for 30-45 minutes before serving. This allows it to set for cleaner slices. Garnish with dried parsley if desired.

Variations

• Spinach Layer: Squeeze all the liquid out of a 10-oz package of thawed frozen chopped spinach and mix it directly into the ricotta cheese filling.
• Vegetarian Version: Simply omit the ground beef and double the amount of onion or add sautéed sliced mushrooms to the sauce.
• Spicy Kick: Add ½ to 1 tsp. of red pepper flakes to the meat sauce while it simmers.
• Individual Servings: Use small, oven-safe dishes inside your slow cooker to create single-serve lasagna portions. Adjust the cooking time as needed.

Tips for Success

• Don’t Boil the Noodles: The regular, uncooked noodles are perfect for this. The steam and moisture in the slow cooker will cook them perfectly.
• Let it Rest: The 30-45 minute rest after cooking is crucial. It allows the lasagna to firm up, making it much easier to serve.
• Check Your Slow Cooker: If your slow cooker tends to run very hot, check it at the 3.5-hour mark to prevent the edges from burning.

Storage & Reheating

Store cooled leftovers in an airtight container in the refrigerator for up to 4 days. Reheat individual portions in the microwave until hot throughout. For larger portions, reheat, covered with foil, in a 350°F oven for 20-30 minutes.

FAQ

Can I use “no-boil” lasagna noodles?

It’s not recommended. The cooking time and liquid ratio in this recipe are specifically designed for standard, uncooked noodles. No-boil noodles may become too soft.

Why is there water in the sauce?

The water is essential. It creates the steam needed to properly hydrate and cook the uncooked lasagna noodles in the slow cooker.

Can I cook this on HIGH to save time?

Yes, you can cook on HIGH for 2-2.5 hours. However, low and slow cooking yields more tender noodles and better flavor melding.

Do I have to let it rest for so long after cooking?

While you can serve it immediately, it will be very soupy and hard to slice. The resting period allows the layers to set, making for a perfect presentation.

Can I prepare this the night before?

Yes, you can assemble the entire lasagna in the slow cooker insert, cover it tightly, and refrigerate overnight. Let it sit on the counter for 30 minutes before starting the 4-hour cook time.

What if I don’t have Rao’s sauce?

You can substitute with another high-quality jarred marinara sauce. Rao’s is recommended for its thick texture and rich flavor, which works perfectly here.