A soothing, soul-warming soup with tender vegetables blended into a silky golden broth, tiny pastina pasta, and a Parmesan rind for deep umami flavor. This Italian Penicillin Soup is the ultimate comfort food when you’re feeling under the weather or simply craving a nourishing, cozy bowl.
Recipe Overview
Italian Penicillin Soup, sometimes called Sick Day Soup or Chicken Pastina Soup, is Italy’s answer to classic chicken noodle soup. It is a deeply comforting, nourishing bowl built around a simple but flavorful vegetable broth that gets partially blended into a silky, golden base. The secret to its magic lies in the technique: aromatics like onion, carrots, celery, and garlic are simmered until soft, then blended with some of the broth to create a thick, creamy consistency without any cream. The result is a naturally velvety soup that coats your spoon and warms you from the inside out.
The addition of a Parmesan rind while the soup simmers adds a subtle, savory depth and umami richness that makes the broth taste like it has been cooking for hours. Tiny pastina pasta, often star-shaped or acini di pepe, is stirred in at the end and becomes soft and tender, almost melting into the broth. Fresh herbs like thyme, parsley, or rosemary add brightness, and a squeeze of lemon juice at the end lifts all the flavors. Some versions include shredded chicken for extra protein, while others keep it simple and vegetarian, letting the vegetables and Parmesan do all the work.
This soup is incredibly easy to make and relies on just a handful of simple, wholesome ingredients. It is the kind of recipe that grandmothers have been making for generations, passed down as a remedy for colds, flu, and gray days. The warmth, the nutrients, and the sheer comfort of a bowl of Italian Penicillin Soup make it feel like medicine in the best way possible. Whether you are feeling under the weather, craving something cozy, or simply want a nourishing, one-pot meal, this soup delivers every single time.
Why You’ll Love This Recipe
Simple, wholesome ingredients are the foundation of this soup. You need just a few basic vegetables, good broth, tiny pasta, and a Parmesan rind. There are no complicated steps or hard-to-find ingredients, just honest, nourishing cooking that relies on technique and time to build flavor.
Naturally creamy without dairy is one of the most brilliant aspects of this soup. By blending some of the cooked vegetables with a portion of the broth, you create a thick, velvety texture that feels rich and creamy without using any cream, milk, or butter. This makes the soup lighter and easier to digest, especially when you are not feeling well, while still delivering that comforting, silky mouthfeel.
Deeply flavorful and healing is what makes Italian Penicillin Soup so special. The Parmesan rind infuses the broth with a subtle, savory umami that makes every spoonful taste complex and satisfying. The garlic, onion, celery, and carrots provide a gentle sweetness and depth, while fresh herbs and lemon juice brighten everything up. It is nourishing, soothing, and genuinely feels like it is doing your body good.
Quick and easy is another major draw. From start to finish, this soup takes about 40 to 50 minutes, most of which is hands-off simmering time. The steps are straightforward, and the soup comes together in one pot with minimal effort. It is perfect for busy weeknights, meal prep, or those days when you just want something warm and comforting without a lot of fuss.
Versatile and customizable make this soup work for everyone. You can keep it vegetarian by using vegetable broth and skipping the chicken, or make it heartier by adding shredded rotisserie chicken or cooked white beans. You can adjust the amount of pasta, swap in different herbs, or even add a handful of fresh spinach or kale at the end for extra greens. The soup is also naturally gluten-free if you use gluten-free pasta.
Meal prep and leftovers are where this soup really shines. It keeps well in the refrigerator for up to four days, and the flavors deepen and improve as it sits. The soup does thicken as the pasta continues to absorb liquid, so when reheating, add a splash of broth or water to loosen it back up. You can also freeze the soup without the pasta, then cook fresh pasta and add it when you reheat individual portions.
Key Ingredients
Chicken or vegetable broth forms the base of the soup. Using a good-quality, low-sodium broth gives you better control over the seasoning and ensures a clean, flavorful result. Bone broth adds extra richness and nutrients, making the soup even more nourishing.
Carrots, celery, onion, and garlic are the classic aromatic vegetables that build the flavor foundation. They are simmered until tender, then partially blended to create a thick, creamy broth. The natural sweetness of the carrots, the savory depth of the onion and celery, and the pungency of the garlic all come together to create a balanced, flavorful base.
Parmesan rind is the secret ingredient that elevates this soup from simple to extraordinary. As the rind simmers in the broth, it releases savory, umami-rich flavor that makes the soup taste deeply complex and satisfying. If you do not have a Parmesan rind, you can add a few tablespoons of grated Parmesan at the end, but the rind adds a unique depth that is hard to replicate.
Pastina or tiny pasta is what makes this soup so comforting and nostalgic. Pastina literally means “little pasta” in Italian, and it refers to any very small pasta shape like stars, acini di pepe, ditalini, or orzo. The tiny pasta cooks quickly and becomes soft and tender, almost melting into the broth. If you cannot find pastina, any small soup pasta will work.
Fresh herbs like thyme, bay leaves, parsley, or rosemary add aromatic brightness and depth. Thyme and bay leaves are simmered in the broth to infuse their flavor, while fresh parsley is stirred in at the end for a pop of color and freshness.
Lemon juice is optional but highly recommended. A squeeze of fresh lemon juice at the end brightens all the flavors and adds a subtle acidity that balances the richness of the Parmesan and the sweetness of the vegetables.
Shredded chicken is optional but turns the soup into a more substantial, protein-rich meal. Rotisserie chicken is the easiest option, or you can use leftover cooked chicken. The chicken is added at the very end, just to warm through, so it stays tender and juicy.
Olive oil, salt, and black pepper round out the seasoning. A drizzle of good olive oil at the end adds richness and a silky finish, while salt and pepper help balance and enhance all the other flavors.
Recipe Card
Italian Penicillin Soup
Servings: 4–6
Prep time: 10 minutes
Cook time: 35–40 minutes
Total time: 45–50 minutes
Ingredients
- 2 tablespoons extra virgin olive oil
- 1 large yellow onion, quartered
- 3 medium carrots, peeled and roughly chopped
- 3 ribs celery, roughly chopped
- 5–6 cloves garlic, peeled and smashed
- 8 cups low-sodium chicken or vegetable broth
- 1 Parmesan rind (2–3 inches)
- 2–3 sprigs fresh thyme
- 2 fresh bay leaves (or 1 dried)
- 1 teaspoon kosher salt, plus more to taste
- Freshly ground black pepper
- 1/2 cup uncooked pastina or other tiny pasta
- 2–3 cups shredded rotisserie chicken (optional)
- Juice of 1/2 lemon
- Fresh flat-leaf parsley, chopped, for garnish
- Grated Parmesan cheese, for serving
Step-by-Step Instructions
1. Sauté the aromatics
Heat the olive oil in a large Dutch oven or soup pot over medium heat. Add the quartered onion, chopped carrots, celery, and smashed garlic. Season with a pinch of salt and black pepper. Cook, stirring occasionally, for 3 to 4 minutes just to soften slightly and release some aroma. You are not trying to brown them, just gently cook them to start building flavor.
2. Add broth and simmer
Pour in the chicken or vegetable broth. Add the Parmesan rind, thyme sprigs, bay leaves, and 1 teaspoon of kosher salt. Stir well and bring the soup to a boil over medium-high heat. Once boiling, reduce the heat to low, cover, and let the soup simmer gently for 20 to 25 minutes, or until the vegetables are very soft and tender.
3. Blend the vegetables
Using a slotted spoon, carefully remove the cooked vegetables from the pot and transfer them to a blender. Add about 1 to 2 cups of the hot broth to the blender as well. Remove the center cap from the blender lid and cover the opening with a clean kitchen towel to allow steam to escape. Blend on high until completely smooth and creamy, about 30 to 60 seconds.
4. Return the puree to the pot
Pour the blended vegetable mixture back into the pot with the remaining broth. Stir well to combine. The soup should now have a thick, creamy, golden consistency. Taste and adjust the seasoning with more salt and black pepper if needed.
5. Cook the pasta
Bring the soup back to a gentle boil over medium heat. Add the uncooked pastina and stir. Reduce the heat to medium-low and simmer, stirring occasionally, for about 10 to 15 minutes, or until the pasta is tender. If you are adding shredded chicken, stir it in during the last 3 to 5 minutes of cooking just to warm it through.
6. Finish and serve
Remove the Parmesan rind, thyme sprigs, and bay leaves from the soup and discard. Stir in the lemon juice and taste one more time, adjusting the seasoning as needed. Ladle the soup into bowls and garnish with chopped fresh parsley, a drizzle of olive oil, and freshly grated Parmesan cheese. Serve hot with crusty bread.
Tips for Best Results
Use a slotted spoon to remove the vegetables before blending so you do not transfer too much liquid to the blender at once. This makes blending easier and safer, and it gives you better control over the final consistency.
Blend carefully and in batches if needed. Hot soup expands when blended, so always vent the blender lid and cover with a towel to avoid splattering. If your blender is small, blend in two batches.
Adjust the thickness to your preference. If the soup is too thick after blending, add more broth or water. If it is too thin, let it simmer a bit longer or blend in a few more cooked vegetables.
Do not skip the Parmesan rind. It adds a depth of flavor that is hard to replicate with just grated cheese. Save your Parmesan rinds in the freezer specifically for recipes like this.
Cook the pasta in the soup for maximum flavor. The starch from the pasta thickens the broth slightly and makes the soup even more comforting. If you are meal prepping, consider cooking the pasta separately and adding it to individual portions when reheating to prevent it from becoming mushy.
Season gradually and taste often. Different broths have varying levels of salt, so it is important to taste as you go and adjust the seasoning at the end.
Store leftovers properly. Let the soup cool to room temperature, then transfer it to airtight containers and refrigerate for up to four days. The soup will thicken as it sits, so add a splash of broth or water when reheating. To freeze, cool completely and freeze in portions for up to three months. Reheat gently on the stovetop.
Serving Suggestions and Variations
Serve this Italian Penicillin Soup with crusty Italian bread, garlic toast, or warm focaccia for dipping and soaking up the golden broth. A simple side salad with arugula, lemon, and shaved Parmesan complements the richness of the soup beautifully.
For a heartier version, add shredded rotisserie chicken, cooked white beans, or cannellini beans for extra protein and substance. You can also stir in a handful of fresh spinach or kale during the last few minutes of cooking for added greens and nutrition.
Make it vegetarian by using vegetable broth and skipping the chicken. The soup is naturally flavorful and satisfying even without meat, thanks to the Parmesan rind and the blended vegetables.
Add extra vegetables for more texture and nutrients. Diced zucchini, chopped tomatoes, or even a small handful of frozen peas can be stirred in during the last few minutes of cooking.
Try different herbs for a slightly different flavor profile. Fresh rosemary, oregano, or basil can replace the thyme, or use a combination of your favorites. A sprig of sage adds a lovely earthy note.
Make it spicy by adding a pinch of red pepper flakes or a few slices of fresh chili to the broth while it simmers. The gentle heat pairs beautifully with the creamy, savory broth.
Top creatively with extras like toasted breadcrumbs, crispy pancetta, a drizzle of truffle oil, or a dollop of pesto for a fun twist.
This Italian Penicillin Soup is one of those rare recipes that truly earns its name. It is nourishing, soothing, and deeply comforting, making it the perfect remedy for cold days, sick days, or any day when you need a bowl of warmth and care. Whether you are feeding a family, meal prepping for the week, or simply craving something cozy, this soup is guaranteed to make you feel better from the inside out.
