The Ultimate Grilled Cheese Sandwich

2 slices of hearty bread (sourdough, ciabatta, or whole wheat are great options)
2 tablespoons unsalted butter (room temperature)
2 slices of sharp cheddar cheese (or a combination of cheeses like mozzarella, Gruyère, or fontina)
1 tablespoon Dijon mustard (optional for a tangy twist)
1 tablespoon mayonnaise (for a creamy and crispy crust)
Fresh herbs (optional, like rosemary or thyme, for an aromatic touch)
Salt and pepper to taste

Prep the Bread:
Spread the butter evenly on one side of each slice of bread. If you’re adding mayonnaise, spread it on the other side to create an ultra-crispy golden crust when grilled. If you’re using Dijon mustard, spread it on one slice of bread for an extra layer of flavor.
Add the Cheese:
Layer the cheese slices between the two slices of bread. For an extra cheesy sandwich, feel free to add more than one type of cheese. Make sure to choose cheeses that melt well, like cheddar or Gruyère.
Grill the Sandwich:
Heat a non-stick skillet or griddle over medium-low heat. Once hot, place the sandwich in the pan, buttered side down. Press gently with a spatula to ensure even grilling. Cook for about 3-4 minutes on one side, until golden brown.
Flip and Continue Cooking:
Flip the sandwich and cook the other side until golden brown and the cheese has melted, about 3-4 more minutes. The bread should be crispy and the cheese oozy and gooey.
Serve:
Remove the sandwich from the skillet, let it sit for 1-2 minutes (this helps the cheese set a bit), then slice it in half and serve immediately.

For extra flavor: Add a slice of tomato, caramelized onions, or even a layer of pesto between the cheese.
Cheese options: Try using a mix of cheeses for different textures and flavors. A sharp cheddar combined with creamy mozzarella creates the perfect balance.
Low and slow cooking: Keep the heat medium-low to ensure the bread toasts without burning while the cheese melts properly.
Experiment with bread: Try using sourdough for a tangy kick or a brioche bun for a sweeter, richer flavor.