A pot of chicken soup can’t solve a cold, but it can make a long, chilly day feel easier. This slow cooker Italian penicillin soup brings together tender chicken, vegetables, tiny pasta, Parmesan, and fragrant Italian herbs in one comforting bowl.
“Penicillin soup” is only a cozy nickname, not a medical treatment. What you get is homemade comfort with little active work: the slow cooker softens the vegetables, a quick blend gives the broth a silky texture, and the final additions keep every bowl hearty.
You’ll learn how to prep, cook, blend, finish, store, and customize the soup so it fits your family’s dinner routine.
Easy Slow Cooker Italian Penicillin Soup Recipe
This easy slow cooker Italian penicillin soup recipe makes about 6 servings. Plan on 15 to 20 minutes of prep, then cook it on Low for 4 to 6 hours or High for 3 to 4 hours. The pasta needs another 25 to 45 minutes near the end, so dinner mostly takes care of itself.
Gather these ingredients:
- 1 1/2 to 2 pounds boneless chicken breasts or thighs, or bone-in chicken pieces
- 1 medium yellow onion, roughly chopped
- 3 carrots, peeled and chopped
- 3 celery stalks, chopped
- 4 garlic cloves, peeled
- 6 cups low-sodium chicken broth
- 1 to 2 cups water, as needed
- 1 teaspoon kosher salt, plus more to taste
- 1/2 teaspoon black pepper
- 4 to 6 sprigs fresh thyme
- 1 bay leaf
- 3/4 cup pastina, acini di pepe, stelline, or orzo
- 1/2 cup finely grated Parmesan, plus more for serving
- 1/4 cup chopped fresh parsley
- 1 to 2 teaspoons fresh lemon juice, optional
The onion, carrots, celery, and garlic create a savory foundation as they slowly soften in the broth. When you blend them, they thicken the soup without cream or flour. Fresh thyme adds a clean herbal note, while Parmesan gives the finished broth a gentle salty richness.
Bone-in chicken adds more flavor to the broth, especially if you use thighs. Boneless chicken is quicker to shred and works well when you need an easy weeknight meal.
You only need a slow cooker, tongs, a ladle, cutting board, fork, and an immersion blender. A regular blender also works if you blend carefully in small batches.
Serve this soup when you want something warm and familiar, whether you’re tired after work or settling in on a cold afternoon.
Prep the Vegetables for a Better Broth
Rough chopping is enough here. Since the carrots, onion, celery, and garlic cook for several hours, you don’t need perfect knife work. Aim for pieces that are roughly the same size so they soften at a similar pace.
Place the chicken in the bottom of the slow cooker. Add the onion, carrots, celery, garlic, chicken broth, salt, pepper, thyme, and bay leaf. If your slow cooker runs hot or the ingredients are barely covered, pour in 1 cup of water.
Keep the Parmesan and parsley out for now. Adding both at the end preserves their fresh flavor and prevents the cheese from clumping against the cooker.
A blended vegetable base makes broth feel rich without heavy cream, but the chicken and pasta still give each spoonful texture.
How to Make Slow Cooker Italian Penicillin Soup
Cover the cooker and select Low for 4 to 6 hours, or High for 3 to 4 hours. Cooking times vary by slow cooker and the size of your chicken pieces, so rely on doneness rather than the clock alone.
The vegetables should collapse easily when pressed with a fork. The chicken should pull apart with little resistance, and its thickest portion must reach 165°F. Follow the USDA safe temperature chart rather than judging chicken only by its color.
Use tongs to transfer the chicken to a cutting board. Remove and discard the bay leaf and thyme stems. Then ladle some of the softened vegetables and broth into a blender, or blend directly in the cooker with an immersion blender.
For a regular blender, fill it no more than halfway. Remove the center cap from the lid, cover the opening with a clean kitchen towel, and let steam escape as you blend. Hot liquid expands quickly, so work in batches.
Shred the chicken with two forks, discarding bones and skin if you used bone-in pieces. Return the shredded meat to the slow cooker. Stir in the small pasta, then add another 1 to 2 cups of broth or water if the soup looks thick.
Cook the pasta on High until tender, usually 25 to 45 minutes. Give it a stir once or twice, especially during the last 15 minutes. Finish with Parmesan, parsley, and lemon juice if you want a brighter flavor. Taste before serving, then adjust the salt and pepper.
Read also: Easy Air Fryer Green Beans and Mushrooms Recipe
Build a Silky Broth and Keep Pasta Tender
How to Get a Smooth, Flavorful Broth Without Losing Texture
Blend only the vegetables and some broth if you want a smooth base with visible chicken and pasta. An immersion blender is easiest because you can control the texture directly in the cooker. A countertop blender produces a finer puree, although it takes more care with hot soup.
Blend more vegetables for a thicker, creamier result. Blend less if you prefer a brothy chicken soup with small pieces of carrot and celery. You can also add a Parmesan rind at the start of cooking, then remove it with the bay leaf. Garlic, fresh thyme, and a small squeeze of lemon give the broth more depth without making it heavy.
When to Add Pasta So It Does Not Turn Mushy
Small pasta absorbs broth quickly and continues to swell after cooking. For that reason, add it near the end instead of at the beginning.
Check the package instructions, but start testing the pasta early because slow cookers vary. Stir once or twice, and add warm broth if the pot starts looking more like stew than soup. If you expect leftovers, cook the pasta separately and add it to each bowl instead.
Easy Ways to Customize Italian Penicillin Soup for Your Family
Chicken breasts keep the flavor mild and shred neatly. Thighs stay especially tender, while a mix of bone-in thighs and breasts produces a fuller broth. You can also add extra chicken if your family prefers a more filling bowl.
Pastina, acini di pepe, stelline, and orzo all work well in slow cooker Italian penicillin soup. Stelline and pastina cook quickly, while orzo can take longer and makes the soup thicker. Ditalini is another good choice when you want a more substantial bite.
For more vegetables, stir in baby spinach during the last 5 minutes. Chopped kale needs about 15 to 20 minutes to soften. Fresh parsley keeps the flavor light, while oregano, basil, or a small amount of rosemary creates a different Italian-style profile.
Use hearts of palm rice instead of pasta for a lower-carb version. For a richer finish, add a Parmesan rind while cooking or stir in a teaspoon of olive oil before serving. Add lemon juice only at the end, so it stays fresh and bright.
Read also: Homemade Tortellini Ground Beef Soup Recipe
Beans also make the soup more substantial. Stir in a drained can of cannellini beans after shredding the chicken, then warm them through before adding pasta.
Serve, Store, and Reheat It Safely
Simple Serving, Storage, and Reheating Tips
Ladle the soup into warm bowls and top it with grated Parmesan, parsley, and cracked black pepper. Crusty bread is perfect for catching the silky broth.
If you’re holding the soup for guests, heat it fully first and keep it at 140°F or above. Refrigerate leftovers promptly in shallow airtight containers, ideally within two hours. Cooked chicken leftovers keep well for up to 3 to 4 days when refrigerated properly.
Pasta will absorb broth as it sits, so add a splash of chicken broth or water while reheating. Warm leftovers gently on the stovetop or in the microwave until steaming hot. FoodSafety.gov lists 165°F as the safe temperature for reheated leftovers in its safe minimum temperature guidance.
For the best leftover texture, store the pasta separately whenever possible. Then you can reheat the soup without turning tender pasta soft.
Frequently Asked Questions
Can you make Italian penicillin soup without blending the vegetables?
Yes. Blending mainly gives you a thicker, smoother broth. Leave all the vegetables in pieces for a classic chunky chicken soup, or blend only part of them for a texture that falls between the two.
Can you use frozen chicken in a slow cooker for this soup?
Thaw chicken before putting it in the slow cooker. Refrigerated thawing is the safest choice, although you can also thaw chicken in cold water or the microwave and cook it right away. Always check that the thickest piece reaches 165°F.
What can you use instead of pastina?
Acini di pepe, stelline, orzo, ditalini, and other small pasta shapes all fit this recipe. Because each shape cooks at a different pace, check often near the end. Stop cooking as soon as the pasta is tender.
Why did my soup become too thick after chilling?
Pasta keeps absorbing liquid as the soup cools and rests. Add chicken broth or water a little at a time as you reheat it. Then taste again because thinning the soup can also soften the salt and pepper.
Can you freeze slow cooker Italian penicillin soup?
The chicken and blended broth freeze well. However, pasta often becomes soft after thawing, so freeze the soup without pasta when you can. Add freshly cooked pasta after you reheat the thawed soup.
A Bowl Worth Coming Home To
You can make this soup with basic ingredients and let the slow cooker bring them together while you handle the rest of your day. Blended vegetables turn simple broth into something silky and comforting, while shredded chicken, tiny pasta, Parmesan, and herbs make it feel like a complete meal.
Adjust the pasta, greens, lemon, and seasonings until the flavor suits your table. On a chilly day, serve a generous bowl with warm bread and let dinner stay simple.
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I’m the creator of My Everyday Dish, a food blog focused on easy homemade recipes, comforting family meals, simple baking, and seasonal food ideas. I love finding practical ways to make everyday cooking less stressful and more enjoyable. Here, I share recipes with simple ingredients, clear instructions, and plenty of flavor, helping you make delicious meals and treats you’ll feel confident serving at home.
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