In a large bowl, combine ground beef, breadcrumbs, Parmesan cheese, garlic powder, onion powder, Italian seasoning, salt, pepper, egg, and milk. Mix well to combine.
Using your hands, form the mixture into 1-inch meatballs.
Heat oil in a large skillet over medium-high heat. Add the meatballs and cook, turning occasionally, until golden brown and cooked through, about 10 minutes.
Add marinara sauce to the skillet and stir to coat the meatballs. Simmer for 5 minutes, or until sauce is hot.
Serve warm with your favorite sides.
Interesting Facts
Meatballs can be made with any type of ground meat, such as turkey, pork, or lamb.
You can add other ingredients to the meatballs, such as minced onions, diced bell peppers, or spices.
To make the meatballs even more flavorful, add a few tablespoons of grated Parmesan cheese to the mixture.
These meatballs can be served over pasta, in a sandwich, or on their own.