The sausage hits the hot Dutch oven with a steady sizzle, and those browned crumbles give this soup its savory start. Once the broth is bubbling and the broken lasagna noodles are soft at the edges, the pot starts to feel like a bowl of pasta night and soup night at once. Alfredo Lasagna Soup gets its creamy finish from heavy cream and finely grated Parmesan, with a spoonful of parsley-flecked ricotta waiting for each serving.
I like how the noodles cook right in the broth, so there’s no second pot to wash and their starch gives the soup a little body. The part to watch is the last few minutes: cream and Parmesan go in over low heat, and the soup stays below a boil while the spinach wilts. That gentle finish keeps the broth smooth and leaves the noodles tender rather than falling apart. Each bowl gets its own cool, creamy ricotta topping.
Kitchen Note
Once the cream and Parmesan go in, keep the heat low and resist bringing the pot back to a boil. The cheese melts into the broth more smoothly, and the spinach needs only a couple of minutes to wilt.
Save this Alfredo Lasagna Soup for a night when you want tender pasta, browned sausage, and a creamy ricotta finish in one pot.
Why the Sausage Needs to Brown Before the Onion Goes In
It’s worth giving the sausage its own time in the hot pot before adding anything wet. Browning builds a deeper, more savory base than simply cooking the meat until it’s no longer pink, and the small crumbles spread that flavor through every bowl. The onion goes in after the sausage has browned, so it softens in the same pot without getting in the way of that first stage.
This order also gives you a useful visual check. Look for browned patches on the sausage rather than a pot full of pale, steamed crumbles. Once the onion is added, it releases moisture and softens; that’s exactly what you want at that point, but it can’t create the browned flavor that comes from cooking the sausage first. Keep the early stages separate and the finished broth tastes more rounded, even though everything cooks in one Dutch oven.
Italian sausage already brings seasoning to the base, so the Italian seasoning, black pepper, and measured kosher salt support it rather than needing to carry the whole pot. The final Parmesan adds another savory layer, which is why I keep the salt amount as written instead of salting heavily at the start.
What Gives This Alfredo Broth Its Creamy Finish
- Italian sausage — It seasons the broth as it cooks and gives each spoonful savory meat. The recipe works with the Italian sausage you prefer; hot Italian sausage is an easy way to bring more heat without changing the rest of the ingredient list.
- Yellow onion, garlic, and Italian seasoning — Finely chopping the onion helps it soften in the short cooking time, while minced garlic releases its aroma quickly. Use fresh garlic here; it has a brighter flavor than garlic that’s been sitting minced in a jar. The dried seasoning is a practical pantry ingredient and doesn’t need a premium brand.
- Low-sodium chicken broth — This forms the soup’s base and leaves room for the sausage and Parmesan to contribute their own saltiness. Low-sodium broth is useful here because it gives you a more predictable finish than a heavily salted broth.
- Dry lasagna noodles — Breaking the noodles into short pieces makes them easy to scoop and gives the soup its lasagna feel. Use dry noodles for the stated simmer; fresh pasta won’t cook on the same schedule.
- Heavy cream and Parmesan — Heavy cream gives the broth its rich texture, while finely grated Parmesan disperses through it more readily than large shreds. Grating the cheese finely matters more than buying an expensive wedge; it just needs to be fresh enough to melt smoothly.
- Baby spinach, ricotta, and parsley — Baby spinach wilts quickly into the hot soup. Whole-milk ricotta makes the topping creamy, and fresh parsley keeps it from tasting flat. Part-skim ricotta works if that’s what you have, though the topping will be a little less lush; the ricotta and parsley are stirred together separately so you can add a spoonful to each bowl.
Build the Soup in Stages for Tender Noodles and a Smooth Finish
Brown the Sausage in the Dutch Oven
Set a 6-quart Dutch oven over medium-high heat and cook the sausage for 6–8 minutes, breaking it into small pieces as it browns. The crumbles should have browned spots, not just a cooked-through gray color. Cook until the sausage reaches 160°F. If larger pieces remain, break them up now so they’re easy to eat with the noodles.
Soften the Onion, Then Wake Up the Garlic
Add the finely chopped onion and cook over medium heat for 4–5 minutes, stirring occasionally. It should look softened, not browned or crisp at the edges. Stir in the minced garlic and Italian seasoning and cook for 30 seconds, just until fragrant. Garlic can turn bitter if it stays over the heat too long, so have the broth ready for the next step.
Simmer the Noodles Until Al Dente
Add the kosher salt, black pepper, and chicken broth, then bring the pot to a boil over high heat. Stir in the lasagna noodles broken into 2-inch pieces, lower the heat to medium-low, and simmer uncovered for 10–12 minutes. Stir often, running your spoon across the bottom so pieces don’t stick as they soften. Stop when the noodles are al dente; they should be tender but still have a little bite.
Finish Gently with Cream, Parmesan, and Spinach
Reduce the heat to low before stirring in the heavy cream, finely grated Parmesan, and baby spinach. Cook for 2–3 minutes, stirring until the cheese melts and the spinach wilts. Keep the soup from boiling at this stage; a rolling boil is rough on the creamy broth. The spinach should be soft and folded into the soup, not cooked down until it disappears.
Stir the Ricotta Topping and Ladle
In a small bowl, stir the whole-milk ricotta and chopped parsley together until the green flecks are evenly distributed. Ladle the soup into bowls, then add a spoonful of topping to each serving. Keeping it as a topping gives each bowl a creamy ricotta bite alongside the warm broth and noodles.
Two Easy Ways to Change the Bowl
Turn Up the Heat with Hot Italian Sausage
Use hot Italian sausage instead of a milder Italian sausage for a more peppery, spicy broth. The rest of the soup stays the same, and the ricotta topping gives each spoonful a creamy contrast.
Make a Lower-Carb, Noodle-Free Version
Leave out the lasagna noodles and skip their simmering stage, then continue with the cream, Parmesan, and spinach. The result is a brothier sausage-and-spinach soup rather than a noodle-centered lasagna soup, but it keeps the same creamy finish and ricotta topping.
Storage and Reheating
- Refrigerator: Refrigerate leftovers promptly and use them within 3–4 days. The noodles will continue to absorb broth and soften as the soup sits.
- Freezer: The soup can be frozen in airtight containers for up to 2 months for best quality, but the noodles will soften and the creamy broth may separate when thawed.
- Reheating: Warm it gently in a saucepan over low heat, stirring often, until it reaches 165°F. Avoid boiling; high heat can make the creamy broth less smooth.
Questions That Come Up When Making Alfredo Lasagna Soup
Alfredo Lasagna Soup
Ingredients
Equipment
Method
- In a 6-quart Dutch oven over medium-high heat, cook the sausage, breaking it into small pieces, for 6–8 minutes, until browned and it reaches 160°F.
- Add the onion and cook over medium heat for 4–5 minutes, stirring occasionally, until softened.
- Stir in the garlic and Italian seasoning and cook for 30 seconds, until fragrant.
- Add the salt, pepper, and chicken broth, and bring to a boil over high heat.
- Stir in the broken noodles and simmer uncovered over medium-low heat for 10–12 minutes, stirring often, until the noodles are al dente.
- Reduce the heat to low and stir in the heavy cream, Parmesan, and spinach; cook for 2–3 minutes, stirring, until the cheese melts and the spinach wilts without letting the soup boil.
- In a small bowl, stir together the ricotta and parsley.
- Ladle the soup into bowls.
- Add a spoonful of ricotta topping to each serving.
