4 (½-inch thick) slices pullman or sourdough bread
2 tablespoons unsalted butter
1½ cups grated sharp cheddar cheese
Ranch, homemade or store-bought, for serving
Directions
In a small bowl, combine the mayonnaise with the ranch seasoning. Spread the ranch mayonnaise mixture on one side of each bread slice.
In a medium nonstick or cast-iron skillet, melt 1 tablespoon butter over medium heat. Place 2 bread slices mayonnaise-side down in the skillet. Divide the cheese evenly between the 2 slices. Top with the remaining 2 bread slices, mayonnaise-side up, gently pressing down on the slices with a spatula. Continue to fry the sandwiches until the bottoms are golden brown, 3 to 4 minutes. Using a spatula, flip the sandwiches. Add the remaining 1 tablespoon butter to the skillet and gently press down once again without smashing the sandwiches. Cook, rotating the skillet if necessary to allow for even browning, for another 3 to 5 minutes.
Transfer the sandwiches to a cutting board and let them rest briefly before cutting in half. Serve with a side of ranch.