Name: Instant Pot Lasagna Soup
Prep time: 5 min
Cook time: 5 min
Total time: 25 min
Ingredients: 1/2 tablespoon olive oil; 1 pound ground Italian sausage; 1 large carrot (peeled, and diced); 1 small onion (minced); 2 cloves garlic (minced); 4 cups low sodium chicken stock (or vegetable broth); 16 ounces Italian Stewed Tomatoes; 1 cup spaghetti sauce (or marinara sauce); 1 teaspoon dried oregano; 1/2 teaspoon kosher salt; 1/2 teaspoon pepper; 1/4 teaspoon red pepper flakes (optional); 1 cup dried pasta (such as rotini, elbow noodles, or broken-up sheets of lasagna noodles); 2 cups fresh spinach; mozzarella and parmesan Cheese (for serving)

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This Instant Pot Lasagna Soup recipe delivers all the same classic flavors you love in lasagna in an easy, one-pot soup that comes together in under 30 minutes!

Lasagna Soup being scooped out with ladle from inner pot of Instant Pot.

Inspired by my recipe for lasagna soup, Instant Pot Lasagna Soup has quickly become a favorite Instant Pot recipe.

Reasons to Love Instant Pot Lasagna Soup

Classic Lasagna Flavor Delivered Fast. This cozy recipe delivers all the flavors you love in lasagna, in an easy one-pot soup!
Flavorful Ingredients. The trick to making the BEST Instant Pot Lasagna Soup is to use ingredients that pack in a ton of flavor. Made with hearty Italian sausage, Italian stewed tomatoes, and spaghetti sauce, this Lasagna Soup tastes like it has been simmered for hours yet is on the table in under 30 minutes.
Family-Favorite Recipe. Hearty, comforting, and incredibly flavorful, Instant Pot Lasagna Soup will be a weeknight meal you will want to enjoy again and again!

Notes on Ingredients

Ingredients for Lasagna Soup labeled on white counter.

Sausage: Use raw store-bought or homemade Italian sausage. Chicken, pork, or turkey sausage all work well. If your sausage comes in links, remove it from the casings before browning the meat.
Marinara/Spaghetti Sauce: I recommend using pre-made store-bought or homemade spaghetti sauce or marinara, rather than plain tomato sauce. The spaghetti sauce is already seasoned which gives your soup an incredible depth of flavor with minimal effort or added ingredients.
Stewed Tomatoes: Italian stewed tomatoes are flavored with garlic and oregano and have been stewed for a long period before being canned, which allows the tomatoes to shine. Feel free to blend the stewed tomatoes before adding them to the soup if you find the texture of tomato chunks off-putting.
Chicken Stock: I prefer using chicken stock or Instant Pot chicken stock for making lasagna soup, as it won't overpower the other ingredients. However, beef broth or vegetable broth will work in place of chicken stock. Just be sure that whatever type of broth you select is low-sodium.
Noodles: Use 1 cup of broken-up lasagna noodles, elbow noodles, or bow-tie noodles, as they all require the same cooking time.
Spinach: Fresh baby spinach is an optional, but encouraged addition.

Recipe Modifications

Make it Gluten-Free: For a gluten-free version of Instant Pot lasagna soup, I have had success using Barilla gluten-free noodles. Other brands have not been successful, as they give off too much starch and don't hold up well when pressure-cooked.
Add Kale Instead of Spinach: Feel free to use kale in place of spinach, just be sure to remove the stem and chop or tear it into bite-sized pieces before adding it to the soup, so that it becomes tender.

How to Make Instant Pot Lasagna Soup

While this is an incredibly simple recipe, if you are unfamiliar with cooking in an Instant Pot or the functions of your Instant Pot, be sure to start with How to Use an Instant Pot for the best results on this and future recipes. You will find the full recipe in detail in the recipe card below.

Brown Sausage. Using the saute function, saute the sausage with the onions, carrots, and garlic. If needed, drain off the excess grease if needed/desired and return the inner pot to the Instant Pot. I often find this step unnecessary when using lean ground sausage. The little bit of grease that may remain adds great flavor to the soup.

Carrots, onions, and sausage sauteed in inner pot of Insant Pot.

Deglaze Inner Pot. Add in a bit of the chicken stock and scrape up any browned bits on the bottom of the inner pot to prevent a burn warning.
Layer Ingredients. Add the remaining broth, stewed tomatoes, spaghetti sauce, seasonings, and pasta to the pressure cooker and stir to combine.

Pressure Cook. Secure the lid on Instant Pot and turn the knob to the sealed position. To set the cooking time, use the manual or pressure cook function and cook on High Pressure for 4 minutes. Once the cooking time has elapsed, allow the pressure to release naturally for EXACTLY 5 minutes. This is the perfect amount of time to cook the noodles perfectly. After 5 minutes have elapsed, do a quick release for any remaining pressure. To do this, knock the venting knob from the sealed to venting position, SLOWLY. That will help the liquid from spraying all over your kitchen. And be sure to stand back from the vent knob when you do a quick release of pressure to protect yourself from hot steam or liquid that may escape from the vent knob. You may even opt to place a kitchen towel lightly over the knob to prevent splatter.
Add Spinach. If using, stir the spinach or kale into the inner pot. Let it sit for a minute or two to quickly wilt into the soup.

Lasagna Soup cooked inside Inner pot of instant pot.

∗ important to remember ∗

Normally, I stress using natural pressure release when cooking soups, as the inner pot is filled with hot liquid. But to not overcook the noodles, this is one recipe you will need to release the pressure after 5 minutes of natural pressure release so you don't overcook your noodles.

Serving Suggestions

I recommend serving this Instant Pot Lasagna Soup with shredded or fresh Mozzarella Cheese and shredded Parmesan Cheese or even a dollop of ricotta cheese, to mimic the flavors of Lasagna.

And while lasagna soup is hearty enough to stand on its own as a complete meal, I love serving it with a Homemade Caesar Salad or tossed Greek salad and homemade garlic toast for a delicious meal the entire family will rave about.

Bowl of Lasagna Soup next to instant pot.

Storing Leftovers

Refrigerate: Allow the Instant Pot lasagna soup to cool then transfer it to an airtight container and store in the refrigerator for up to 3 days.
Freeze: Allow the Instant Pot lasagna soup to cool then transfer it to a freezer-safe container leaving 1 inch of space for expansion. Freeze for up to 3 months.
Reheat: If needed, allow the soup to defrost overnight in the refrigerator. Reheat individual servings in heat-safe bowls in 60-second intervals until warmed through. You may need to add in a bit of extra stock to reheat, as the noodles will absorb the liquid as they sit.

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Instant Pot Lasagna Soup