Creamy, cozy, and full of rich flavor, this Easy White Lasagna Soup with Prosciutto & Spinach delivers everything you love about a classic white lasagna — in an effortless, slow cooker soup. Made with a silky white broth, tender mushrooms, salty prosciutto, fresh spinach, and bold Pecorino Romano cheese, this comforting soup is perfect for busy weeknights or relaxed weekend dinners.
If you’re craving a white lasagna soup, a slow cooker creamy soup, or an easy comfort food recipe that feels elevated but simple, this recipe belongs on your table.
Why You’ll Love This White Lasagna Soup
- Slow cooker friendly and mostly hands-off
- Creamy white soup inspired by classic white lasagna
- Made with prosciutto, mushrooms, and spinach
- Rich flavor without being heavy
- Perfect for make-ahead meals and entertaining
This Easy White Lasagna Soup with Prosciutto & Spinach is a cozy favorite for fall, winter, and anytime comfort food cravings hit.
Ingredients
For the Soup Base
- ½ cup unsalted butter
- ½ cup finely chopped onion
- 2 cloves garlic, minced
- 1 pound cremini or white mushrooms, sliced
- 1½ teaspoons salt
- ½ teaspoon freshly ground black pepper
- ¼ cup all-purpose flour
- 6 cups milk
- 2 cups chicken broth
Add-Ins
- 1 (16-ounce) package frozen chopped spinach, thawed and squeezed dry
- 4 ounces prosciutto, cut into thin strips
- ¾ cup dry white wine or vermouth
- 2½ cups finely grated Pecorino Romano cheese
- 1 cup additional Pecorino Romano, freshly grated (for serving)
How to Make Easy White Lasagna Soup in the Slow Cooker
1. Sauté the Vegetables
In a large skillet over medium-high heat, melt the butter. Add the onion and garlic and cook until softened, about 3 minutes. Add the mushrooms, salt, and pepper and sauté until the mushrooms release their moisture and turn golden.
Sprinkle the flour over the vegetables and cook for 2–3 minutes, stirring constantly.
2. Build the Soup Base
Slowly whisk in the white wine, scraping up any browned bits. Add the milk and chicken broth and whisk until smooth. Bring just to a gentle simmer, then remove from heat.
Transfer the mixture to the slow cooker.
3. Slow Cook
Cover and cook on LOW for 3–4 hours, stirring occasionally if possible, until creamy and heated through.
4. Finish with Prosciutto & Spinach
Stir in the spinach, prosciutto, and grated Pecorino Romano. Cover and cook an additional 20–30 minutes, until the cheese is fully melted and the soup is silky.
5. Serve
Ladle into bowls and top with extra freshly grated Pecorino Romano.
Tips for the Best White Lasagna Soup
- Keep the slow cooker on LOW to prevent curdling
- Use freshly grated Pecorino Romano for the smoothest texture
- Squeeze spinach very dry to keep the soup thick and creamy
- Add extra broth if you prefer a thinner soup
Variations
- Add cooked broken lasagna noodles or mafalda pasta
- Swap prosciutto for pancetta or cooked bacon
- Stir in a splash of cream for extra richness
- Add fresh thyme or rosemary for depth
Easy White Lasagna Soup with Prosciutto & Spinach
- Total Time: 0 hours
- Yield: 6 SERVINGS 1x
Description
This Easy White Lasagna Soup with Prosciutto & Spinach is creamy, comforting, and made in the slow cooker. Inspired by classic white lasagna, it’s filled with tender pasta, mushrooms, spinach, and rich Pecorino Romano cheese for an effortless cozy dinner.
Ingredients
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½ cup unsalted butter
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½ cup finely chopped onion
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2 cloves garlic, minced
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1 pound cremini or white mushrooms, sliced
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1½ teaspoons salt
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½ teaspoon freshly ground black pepper
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¼ cup all-purpose flour
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¾ cup dry white wine or vermouth
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6 cups milk
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2 cups chicken broth
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1 (16-ounce) package frozen chopped spinach, thawed and squeezed dry
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4 ounces prosciutto, cut into thin strips
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2½ cups finely grated Pecorino Romano cheese
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Additional grated Pecorino Romano, for serving
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Broken lasagna noodles (optional, cooked separately if desired)
Instructions
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In a large skillet over medium-high heat, melt the butter. Add the onion and garlic and cook until softened, about 3 minutes.
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Add the mushrooms, salt, and pepper. Cook until mushrooms release their liquid and begin to brown.
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Sprinkle flour over the vegetables and cook for 2–3 minutes, stirring constantly.
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Slowly whisk in the white wine, then the milk and chicken broth until smooth. Bring to a gentle simmer, then remove from heat.
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Transfer the mixture to the slow cooker. Cover and cook on LOW for 3–4 hours.
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Stir in the spinach, prosciutto, and Pecorino Romano. Cover and cook an additional 20–30 minutes, until cheese is melted and soup is creamy.
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Serve warm, topped with extra Pecorino Romano.
Notes
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Keep heat low: Always cook this soup on LOW to prevent the milk and cheese from separating.
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Cheese matters: Use freshly grated Pecorino Romano for the smoothest, creamiest texture. Pre-shredded cheese may not melt as well.
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Salt carefully: Prosciutto and Pecorino Romano are naturally salty, so taste before adding extra salt.
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Spinach tip: Squeeze thawed spinach very well to avoid thinning the soup.
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Pasta option: For best texture, cook broken lasagna noodles separately and add them to individual bowls just before serving.
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Make it thinner: Add additional broth or milk if you prefer a lighter soup consistency.
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Storage: Store leftovers in an airtight container in the refrigerator for up to 3 days. Reheat gently over low heat, stirring often.
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Freezing: For best results, freeze the soup before adding cheese. Stir in Pecorino Romano after reheating.
- Prep Time: 15 MINUTES
- Cook Time: 4-5 HOURS
- Category: SOUP
- Method: SLOW COOKER
- Cuisine: ITALIAN INSPIRED
Frequently Asked Questions
Is white lasagna soup salty?
Pecorino Romano and prosciutto are naturally salty, so taste before adding extra salt.
Can I make this ahead of time?
Yes. Reheat gently on low heat, stirring often.
Can I freeze white lasagna soup?
For best texture, freeze before adding cheese and add it after reheating.
Final Thoughts
This Easy White Lasagna Soup with Prosciutto & Spinach is rich, cozy, and deeply comforting — everything you love about white lasagna in an easy, slow cooker soup form. Perfect for busy nights, lazy weekends, or anytime you want something warm and satisfying.
