How do you apply the Parmesan crust?
Spread softened butter on one side of each bread slice, then press the buttered side into finely grated Parmesan cheese to coat evenly before grilling.
What type of Parmesan works best?
Freshly grated Parmesan from a block melts and crisps better than pre-grated varieties, which contain anti-caking agents that can burn.
Can you make this ahead?
Assemble the sandwich with cheese inside just before cooking. The Parmesan crust is best applied immediately before grilling for maximum crispness.
What heat level should you use?
Medium heat allows the Parmesan to brown and crisp without burning while the cheese inside melts fully. Cook 3-4 minutes per side until golden.
Why does the Parmesan crust work?
Parmesan has a lower moisture content than butter alone, creating a firmer crust that crisps and browns rather than just softening.