01 - Arrange bread slices in a shallow dish. Pour pickle juice over the bread, allowing it to soak for 1 minute per side. Gently pat dry with paper towels.
02 - Heat a large nonstick skillet or griddle over medium heat.
03 - Butter one side of each bread slice. Place two bread slices, buttered-side down, onto the heated skillet. Distribute half the shredded cheddar and 2–3 pickle slices onto each.
04 - Sprinkle with freshly ground black pepper, if using.
05 - Place the remaining bread slices on top, buttered-side up.
06 - Toast for 3–4 minutes per side, applying gentle pressure with a spatula, until the bread achieves a golden-brown hue and the cheese is fully melted.
07 - Transfer grilled sandwiches to a cutting board. Allow a brief cooling period, then slice and serve immediately.