In a medium pot over high heat, bring the chicken broth to a boil.
Add the pastina and reduce the heat to medium. Stir occasionally and cook until most of the broth (about 80%) is gone. The pastina should be fully cooked by then.
Turn off the heat. Add the grated parmesan cheese and butter to the pot. Stir gently to mix.
Ladle into individual bowls. Top with more grated parmesan cheese, salt, and pepper. Eat hot and enjoy.