Slow-Cooker Lasagna

By Sarah DiGregorio

Updated Oct. 20, 2021

Slow-Cooker Lasagna
David Malosh for The New York Times. Food Stylist: Simon Andrews.
Total Time
4 hours and 10 minutes to 5 hours
Rating
4(767)
Comments
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This easy slow-cooker lasagna is satisfying in all the ways that matter: Rich ricotta-Parmesan-spinach layers alternate with tender noodles, melted mozzarella and tomato. (A slow cooker will not give the crispiness that an oven does, but you may not even miss it.) It’s also petite compared to many other lasagnas, perfect for feeding a family, not a crowd. If you’ve ever had a one-pot pasta, the texture of the noodles will be familiar to you: They are tender and starchy. Don’t use no-boil or fresh noodles, as they will overcook. If you like, brown some loose Italian sausage in a skillet, pour off the fat and add it with the tomato sauce layers.

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Ingredients

Yield:4 to 6 servings
  • 1pound whole-milk ricotta cheese (about 2 cups)
  • 1(10-ounce) bag or box frozen spinach, thawed and squeezed dry
  • 3ounces finely grated Parmesan (about 1 scant cup)
  • ½cup lightly packed, roughly chopped basil leaves, plus more for topping
  • 5garlic cloves, grated or pressed
  • 1teaspoon dried oregano
  • 1teaspoon onion powder
  • Kosher salt and black pepper
  • Olive oil
  • 1(32-ounce) jar good-quality marinara sauce
  • 9lasagna noodles (7 to 8 ounces)
  • 8ounces shredded mozzarella (2 cups)
Ingredient Substitution Guide
Nutritional analysis per serving (6 servings)

563 calories; 29 grams fat; 14 grams saturated fat; 0 grams trans fat; 10 grams monounsaturated fat; 3 grams polyunsaturated fat; 49 grams carbohydrates; 5 grams dietary fiber; 9 grams sugars; 28 grams protein; 1141 milligrams sodium

Note: The information shown is Edamam’s estimate based on available ingredients and preparation. It should not be considered a substitute for a professional nutritionist’s advice.

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Preparation

  1. Step 1

    In a large bowl, stir together the ricotta, spinach, Parmesan, basil, garlic, oregano, onion powder, ¼ teaspoon salt and a generous amount of black pepper.

  2. Step 2

    Lightly grease the bottom and sides of a 6- to 7-quart slow cooker with olive oil. Ladle about 1 cup of the marinara sauce in the bottom of the slow cooker, and spread it evenly.

  3. Step 3

    Make two layers: Lay 3 lasagna noodles on top of the sauce, breaking the noodles to make a roughly even layer. (This doesn’t need to be perfect; it’s fine if the noodles overlap slightly, and if there are small spots the noodles don’t cover.) Ladle about ¾ cup of sauce on top of the noodles and spread evenly. Evenly dollop about half of the ricotta mixture over the sauce, and use the back of a fork to press it into a roughly even layer. Sprinkle about a third of the shredded mozzarella over the ricotta. Repeat to make one more layer, using three noodles, the ¾ cup sauce, the remaining half of the ricotta mixture, then about half of the remaining mozzarella.

  4. Step 4

    To finish, lay down the remaining 3 lasagna noodles and spread with the remaining sauce. (Reserve the remaining mozzarella.) Cover and cook on low until the internal temperature in the center is at least 140 degrees and the noodles are tender, 3 hours 30 minutes to 4 hours.

  5. Step 5

    Turn off the slow cooker and sprinkle the top of the lasagna with the remaining mozzarella. Remove the crock from the base that contains the heating element and let the lasagna rest with the lid on for 20 to 30 minutes, otherwise it will fall apart when you try to slice it. Sprinkle the top with more torn basil, to your taste. Cut the lasagna with a knife and scoop out servings with a spatula to serve.

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Ratings

4 out of 5
767 user ratings
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Comments

Erika

Question! “No boil” noodles? Uncooked regular noodles? Cooked regular noodles? Thank you!

Rae

If you don't have noodles on hand but have soft corn tortillas, use them. I have successfully substituted them for noodles a number of times.

Daci

This was really good and easy, owing in large part to using a jar of sauce rather than making the sauce. I omitted the salt because the cheeses and sauce are salty enough. I always use cottage cheese instead of ricotta because it is so much less fatty. I puree the cottage cheese to the right texture with an immersion blender and it works great.

Kathryn Macbride

I added a package of skillet cooked ground beef in with the jar of marinara sauce. I used more like 3 cups of shredded mozzarella, and I used a half a chopped onion instead of the onion powder. I followed instructions as to resting the lasagna out of the base and the cheese melted perfectly on top. The lasagna cut into pieces with my knife and the layers looked perfect on my plate. This lasagna was the best I have ever had.

Kim LeBienvent

Fantastic easy recipe. I opted for orzo instead of lasagna noodles as a quicker options. I added a bit of chicken stock for some richness. Amazing.

Beth E.

I mixed the ricotta cheese with an egg and Italian parsley, my husband doesn’t like spinach. Used Rao’s marinara sauce. This turned out really well and was fun to put together. I cooked it for 4 1/2 hours.

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