Viral Italian Penicillin Soup is the internet’s favorite comfort food for a reason: it is essentially Italian grandmother medicine in a bowl. A golden, garlicky chicken broth loaded with sweet carrots, tender celery, shredded chicken, and tiny pastina pasta, finished with a silky swirl of egg yolk, lemon juice, and Parmesan, it tastes like a warm hug on a cold day or a sick day. Social media fell in love with it because it looks deceptively simple — a pot of broth, a handful of pasta, a squeeze of lemon — yet every spoonful is deeply savory, bright, and soothing.
This is a modern take on the classic Italian pastina soup that generations of nonnas have made for colds, rainy days, and homesick grandchildren. The viral version keeps the soul of the original but adds a richer, restaurant-style finish: the broth is infused with garlic and Parmesan rind, the chicken is poached right in the pot so none of its flavor is lost, and the egg yolk enrichment gives the soup a luscious, velvety body without any cream. Serve it steaming hot with extra Parmesan and crusty bread, and you will understand why millions of people have made it their go-to soup.
Why You’ll Love This Italian Penicillin Soup
- Ready in about 45 minutes: One pot, simple ingredients, and a fast cook time make this an easy weeknight dinner or a quick remedy when someone is feeling under the weather.
- Silky without cream: Tempered egg yolks and Parmesan give the broth a rich, velvety texture while keeping the soup light and fresh-tasting.
- Packed with cozy flavor: Garlic, lemon, Parmesan rind, and sweet vegetables build layers of savory, bright flavor in every spoonful.
- Kid-approved comfort: Tiny pastina pasta and tender shredded chicken make this a soup even picky eaters happily slurp up.
- Perfect for sick days: Warm broth, gentle ingredients, and a hit of lemon and garlic are exactly what you crave when you need comfort most.
- Easy to customize: Swap the greens, adjust the lemon, or use leftover rotisserie chicken to make it your own.
Ingredients
For the Soup:
- 1 tablespoon olive oil
- 1 medium yellow onion, finely diced
- 2 medium carrots, peeled and finely diced
- 2 celery stalks, finely diced
- 4 garlic cloves, thinly sliced
- 8 cups (2 quarts) low-sodium chicken broth
- 1 Parmesan rind (about 2 inches, optional but highly recommended)
- 1 pound boneless, skinless chicken breasts (about 2 large breasts)
- 1 teaspoon kosher salt, plus more to taste
- 1/2 teaspoon black pepper
- 1 cup pastina pasta (such as stelline, acini di pepe, or orzo)
- 2 cups baby spinach, roughly chopped (optional)
For the Finishing Enrichment:
- 2 large egg yolks, at room temperature
- 1/2 cup freshly grated Parmesan cheese, plus more for serving
- Juice of 1 lemon (about 3 tablespoons), plus more to taste
- 1 tablespoon fresh parsley, chopped, for garnish
- Extra-virgin olive oil, for drizzling (optional)
Instructions
- Sauté the aromatics: Heat the olive oil in a large pot or Dutch oven over medium heat. Add the onion, carrots, and celery with a pinch of salt and cook, stirring occasionally, for 6 to 8 minutes, until softened and sweet-smelling. Stir in the sliced garlic and cook for 1 minute more, just until fragrant — do not let the garlic brown.
- Build the broth: Pour in the chicken broth, scraping up any browned bits from the bottom of the pot. Add the Parmesan rind, salt, and pepper, and bring the broth to a gentle simmer over medium-high heat.
- Poach the chicken: Add the chicken breasts to the simmering broth, reduce the heat to medium-low, and cover the pot. Simmer gently for 15 to 18 minutes, until the chicken is cooked through and reaches an internal temperature of 165°F. Do not boil vigorously, or the chicken will turn tough.
- Shred the chicken: Remove the chicken to a plate and shred it with two forks into bite-size pieces. Remove and discard the Parmesan rind. Taste the broth and adjust the salt and pepper as needed.
- Cook the pastina: Return the broth to a gentle boil and stir in the pastina. Cook according to the package directions, usually 5 to 7 minutes, until just tender. Pastina absorbs liquid quickly, so keep the heat moderate and stir occasionally so it does not stick. If using spinach, stir it in during the last minute of cooking until just wilted.
- Temper the egg yolks: While the pasta cooks, whisk the egg yolks, grated Parmesan, and lemon juice together in a small bowl until smooth and thick. This is the mixture that gives the soup its silky finish.
- Enrich the soup: Remove the pot from the heat. While stirring the soup constantly in a slow circle, drizzle in the egg yolk mixture in a thin stream. Return the shredded chicken to the pot and stir gently. The residual heat will thicken the soup into a velvety, golden broth — never return it to a boil after adding the yolks, or the eggs will scramble.
- Serve: Ladle the soup into warm bowls, garnish with chopped parsley and extra Parmesan, and finish with a drizzle of good olive oil if you like. Serve immediately with crusty bread for dipping.
Tips for the Best Italian Penicillin Soup
- Use room-temperature yolks: Cold yolks are more likely to seize when they hit hot broth. Set the eggs out while you prep the vegetables, and whisk them well before tempering.
- Keep the heat gentle: A rolling boil toughens chicken and clouds the broth. A lazy simmer gives you the clearest, most flavorful soup.
- Do not skip the Parmesan rind: It melts into the broth and adds a deep, savory richness that grated cheese alone cannot match. Save rinds in the freezer for soups like this one.
- Cook pastina separately for leftovers: If you plan to save the soup, cook the pastina in a separate pot of salted water and add it to each bowl. Pastina left sitting in broth will swell and soak up the liquid overnight.
- Season at the end: Broth brands vary in saltiness, and the Parmesan adds salt too. Taste after the enrichment step and add lemon or salt a little at a time until the flavor pops.
- Use good broth: Since broth is the backbone of this soup, use the best chicken broth you can find — homemade if you have it, or a quality low-sodium store-bought brand.
Variations
- Rotisserie chicken shortcut: Skip the poaching step and use about 3 cups of shredded rotisserie chicken, stirred in with the cooked pastina. Dinner is on the table in under 30 minutes.
- Greens swap: Replace the spinach with chopped kale (add it 5 minutes earlier so it softens) or escarole, a classic Italian soup green.
- Extra lemon and herbs: Add the zest of the lemon along with the juice, plus a handful of fresh dill or basil, for an even brighter, fresher finish.
- Make it heartier: Stir in a can of drained white beans with the chicken for extra protein and fiber, or add a second cup of pastina if you like a thicker, stew-like soup.
- Gluten-free version: Use a small gluten-free pasta or a cup of cooked rice in place of the pastina — the egg yolk enrichment still gives the soup its signature silkiness.
Storage & Reheating
Store leftover soup in an airtight container in the refrigerator for up to 3 days. Keep in mind that pastina will continue to absorb broth as it sits, so the soup will thicken — simply loosen it with a splash of extra chicken broth when reheating. Reheat gently over medium-low heat, stirring often, until steaming hot but not boiling; a hard boil can break the silky egg-enriched texture. If you cooked the pastina separately, store the pasta and soup in separate containers and combine them when serving for the best texture.
This soup also freezes well without the pasta: cool the broth and chicken completely, freeze in portions for up to 3 months, then thaw overnight in the refrigerator and reheat gently. Cook fresh pastina and stir in the egg yolk enrichment just before serving for a just-made taste.
Frequently Asked Questions
What is pastina, and what can I use instead?
Pastina is the Italian word for tiny pasta shapes, most commonly stelline (little stars) or acini di pepe (tiny beads). If you cannot find pastina, small orzo, ditalini, or even broken-up angel hair pasta all work beautifully — just adjust the cooking time to the package directions.
Will the egg yolks scramble in the hot soup?
Not if you follow two rules: take the pot off the heat first, and stir constantly while drizzling the yolk mixture in slowly. The residual heat gently cooks the yolks into a smooth, creamy emulsion rather than scrambling them. Never let the soup boil after the yolks go in.
Can I make this soup ahead of time?
Yes. Make the broth, chicken, and vegetables up to 2 days ahead and refrigerate them, then reheat gently, cook fresh pastina, and add the egg yolk enrichment just before serving. This keeps the pasta tender and the broth silky.
Is Italian penicillin soup actually good when you are sick?
It is a wonderful sick-day soup: warm broth helps with hydration, the steam can soothe congestion, and the combination of chicken, vegetables, garlic, and lemon is gentle on the stomach while still tasting great. It is comfort food, not medicine, but generations of Italian families swear by it for a reason.
Whether you are fighting off a cold, warming up on a chilly evening, or just craving something deeply comforting, this Viral Italian Penicillin Soup delivers. Ladle it up hot, shower it with Parmesan, grab a hunk of crusty bread, and enjoy the soup that has taken over the internet — one cozy, golden spoonful at a time.