Start by combining the shredded cheddar and mozzarella cheeses in a small bowl, mixing them well for a flavorful melt.
2 oz mozzarella cheese, 2 oz cheddar cheese
Brush one side of each bread slice generously with melted butter; the buttered sides will serve as the outer crust.
1 tbsp unsalted butter
Place one bread slice, buttered side down, onto a heated non-stick skillet over medium heat, pressing slightly to ensure contact.
Spread the cheese mixture evenly on top of the bread in the skillet, creating a generous layer that will melt into gooey goodness.
Cover the cheese with the second slice of bread, buttered side up, and gently press down to keep everything in place.
Cook the sandwich for about 3-4 minutes until the bottom is golden brown and crispy, listening for a slight crackle as the crust forms.
Carefully flip the sandwich using a wide spatula, pressing lightly to ensure even contact, and cook for another 3-4 minutes until the other side is also crispy and cheese is melted inside.
Use a spatula to lift and inspect the crust; it should be a rich, golden hue with a slight crackle when pressed.
Remove the sandwich from the pan and let it rest for a minute; this allows the cheese to settle and prevents it from oozing out upon slicing.
Slice the grilled cheese carefully in half, revealing the gooey interior with melted cheese stretching between the halves.
Serve hot, enjoying the combination of crisp crust and melted cheese inside for a perfect, comforting bite.
