Italian Penicillin, also known as pastina soup, originated as a humble peasant dish in Southern Italy where simple ingredients like tiny pasta, broth, butter, and Parmesan were used to create a nourishing, restorative meal for sick family members. Its nickname reflects the belief that the comforting broth and cheese helped ease colds and flu.

In the Campania region, small star‑shaped pastina called "stelline" is common, often flavored with a splash of olive oil. In the north, butter and Parmesan dominate, while in the south, a drizzle of extra‑virgin olive oil and a pinch of red pepper flakes may be added for heat. Some families also include a poached egg for extra protein.

Traditionally the soup is ladled into shallow bowls, topped with a generous sprinkle of freshly grated Parmesan and a crack of black pepper. It is often enjoyed with a slice of crusty bread or a small buttered focaccia on the side, making it a complete, comforting meal.

Pastina soup is frequently made for sick family members, as a quick comfort food after church gatherings, and during the colder months as a warming starter. It also appears in school lunch programs in Italy because of its simplicity and nutritional balance.

A light arugula salad with lemon vinaigrette, a simple bruschetta with tomatoes, or a serving of roasted vegetables complement the mild flavors of the soup. For a heartier meal, serve alongside meatballs in tomato sauce or a slice of baked eggplant Parmesan.

Authentic ingredients include chicken or veal stock, tiny pastina pasta, unsalted butter, and freshly grated Parmigiano‑Reggiano. Acceptable substitutes are vegetable stock for a vegetarian version, orzo or acini di pepe for the pasta, and Pecorino Romano if Parmesan is unavailable.

Common errors include letting the pasta sit unattended and stick to the pan, adding Parmesan while the broth is still boiling which causes clumps, and over‑cooking the pastina so it becomes mushy. Follow the stirring and resting steps carefully for the best texture.

Adding the cheese off the heat prevents the proteins in Parmesan from coagulating and forming gritty clumps. The residual heat is enough to melt the cheese smoothly, creating a velvety broth without a grainy texture.

Yes, you can prepare the broth and grate the cheese ahead of time. Store the broth in the refrigerator and reheat gently, then add fresh pastina and finish with cheese just before serving. The soup keeps up to 2 days refrigerated in an airtight container.

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Coco Larkin Cooks emphasizes everyday, peasant‑style recipes that you can find in a typical home kitchen, avoiding overly fancy techniques or hard‑to‑find ingredients. The channel prioritizes flavor, speed, and practicality over restaurant‑style presentation.