Italian Penicillin Soup: The Ultimate Restorative Pastina Recipe
In the world of culinary medicine, few dishes hold as much prestige as Italian Penicillin Soup. Known in Italy as Minestrina or simply Pastina, this golden, comforting bowl of soup is the traditional remedy for everything from the common cold to a long, exhausting day.1
Whether you are looking for a nostalgic childhood favorite or a nutrient-dense meal to boost your immune system, mastering the art of the perfect Pastina is a rite of passage for any home cook. In this guide, we will break down the science of why this soup works and provide a professional, step-by-step method to achieving that signature silky texture.
Why is it Called “Italian Penicillin”?
The nickname “Italian Penicillin” isn’t just a clever marketing term; it refers to the soup’s reputation as a healing tonic. The combination of collagen-rich chicken broth, easy-to-digest starches, and the protein from a whisked egg creates a meal that is gentle on the stomach yet highly fortifying.
For generations, Italian nonnas have relied on this recipe because:
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Hydration: The high broth-to-pasta ratio ensures excellent hydration.
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Easy Digestion: Tiny pasta shapes (pastina) require minimal digestive effort.
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Immune Support: Garlic, onions, and carrots provide essential vitamins and antioxidants.
Ingredients: Everything You Need
The beauty of this recipe lies in its simplicity. For the best results, prioritize high-quality, organic ingredients.
The Soup Base
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6 cups Chicken Bone Broth: Homemade is best, but a high-quality store-bought low-sodium broth works well.2
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1 cup Pastina: Look for Stelline (stars), Acini di Pepe, or Orzo.3
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2 large Carrots: Peeled and cut into large chunks.4
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1 stalk Celery: Cut into large chunks.
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1 small Yellow Onion: Peeled and halved.
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2 cloves Garlic: Smashed.
The Finishing Touches
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1 large Egg: Room temperature.
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½ cup Parmigiano-Reggiano: Freshly grated (avoid the canned variety).
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1 tsp Extra Virgin Olive Oil: For finishing.
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Kosher Salt and Black Pepper: To taste.
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Fresh Parsley: For a bright, herbaceous finish.5
Step-by-Step Instructions
1. Fortify the Broth
Place the chicken broth, carrots, celery, onion, and garlic in a large pot. Bring to a boil, then immediately reduce to a low simmer. Cover and let the vegetables infuse the broth for 20 minutes.
Expert Tip: Use a slotted spoon to remove the vegetables after 20 minutes. Some prefer to mash the carrots back into the soup for extra Vitamin A, while others prefer a crystal-clear broth.
2. Cook the Pastina
Bring the infused broth back to a gentle boil. Add the 1 cup of pastina and a pinch of salt. Cook according to the package directions (usually 6 to 9 minutes) until the pasta is al dente.
Do not drain the liquid. The starch from the pasta is essential for the soup’s body.6
3. Create the “Liaison” (Egg & Cheese)
While the pasta cooks, whisk the egg and the grated Parmigiano-Reggiano in a small bowl until it forms a thick paste. This mixture is what gives Italian Penicillin its creamy, “crema” texture without using heavy cream.
4. Temper the Egg
To prevent the egg from scrambling, take one ladle of the hot broth and slowly whisk it into your egg and cheese mixture. Once combined, pour the tempered mixture back into the main pot.
5. Emulsify and Serve
Turn off the heat. Stir the soup vigorously for 30 seconds until the broth becomes opaque and silky. Season with salt and pepper to taste. Ladle into warm bowls and finish with a drizzle of olive oil and fresh parsley.
Expert Tips for the Best Pastina
Use the Parmesan Rind
Never throw away the hard rind of your Parmigiano-Reggiano. Drop it into the broth during the infusion stage. It adds a deep, savory umami flavor that salt alone cannot replicate.
Don’t Overcook the Pasta
Because pastina is so small, it continues to cook even after you turn off the heat. Aim for a slightly firm “bite” so that by the time you sit down to eat, the texture is perfect.
Ingredient Substitution Table
| Component | Standard Ingredient | Substitution |
| Pasta | Stelline (Stars) | Orzo or Ditalini |
| Broth | Chicken Bone Broth | Vegetable Stock or Miso Broth |
| Cheese | Parmigiano-Reggiano | Pecorino Romano (Saltier) |
| Fat | Olive Oil | Unsalted Butter |
Serving & Storage Suggestions
Best Accompaniments
Italian Penicillin is a complete meal on its own, but it pairs beautifully with:
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Crusty Bread: To soak up the remaining golden broth.
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Sautéed Greens: A side of garlicky spinach or escarole adds fiber and iron.
Storage and Reheating
Pastina is notorious for “drinking” the broth as it sits. If you have leftovers, store them in the fridge for up to 3 days. When reheating, you will likely need to add an extra ½ cup of water or broth to return it to a soup-like consistency. Reheat gently on the stovetop rather than the microwave to keep the egg base from separating.
Nutrition Information (Per Serving)
Serves 4
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Calories: 290 kcal
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Protein: 16g
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Total Fat: 10g
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Saturated Fat: 4g
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Carbohydrates: 34g
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Fiber: 2g
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Sugar: 2g
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Sodium: 750mg
Frequently Asked Questions (FAQ)
Is Pastina the same as Italian Penicillin?
Yes. While “Pastina” refers to the small pasta shapes, “Italian Penicillin” is the colloquial name for the specific preparation of pastina in broth with egg and cheese used for medicinal or comfort purposes.
Can I make this soup vegan?
To make a vegan version, use a rich vegetable broth, omit the egg, and use nutritional yeast or a vegan parmesan alternative. The texture will be less creamy but still very comforting.
Why did my egg scramble in the soup?
This usually happens if the broth is too hot or if you didn’t “temper” the egg. Always whisk a little hot broth into the egg mixture first to raise its temperature slowly before adding it to the pot.