Steaming hot corned beef piled on rye with spicy mustard is a protein-packed deli heavyweight. This savory, family-favorite sandwich delivers unbeatable deli flavor.
Preheat a skillet over medium heat and add 1 tbsp unsalted butter to melt, coating the pan.
Lay out the rye bread slices and spread spicy brown mustard evenly on one side of each slice.
Pile 4 oz of corned beef onto four bread slices, followed by a slice of Swiss cheese.
Top each sandwich with the second slice of rye bread, mustard side down, and lightly butter the top.
Place sandwiches in the skillet, cover, and cook for 3–4 minutes per side, pressing gently and turning until cheese melts and bread crisps golden brown. Serve immediately while steaming hot.