Ingredients Meat & Poultry Beef Recipes Ground Beef Recipes Aged-Cheddar-and-Swiss Cheeseburgers By Martha Stewart Editors Martha Stewart Editors Facebook Instagram Twitter Website An article attributed to "Martha Stewart Editors" indicates when several writers and editors have contributed to an article over the years. These collaborations allow us to provide you with the most accurate, up-to-date, and comprehensive information available.The Martha Stewart team aims to teach and inspire readers daily with tested-until-perfected recipes, creative DIY projects, and elevated home and entertaining ideas. They are experts in their fields who research, create, and test the best ways to help readers design the life they want. The joy is in the doing. Editorial Guidelines Updated on January 14, 2019 Print Share Share Tweet Pin Email Photo: Linda Pugliese Prep Time: 30 mins Total Time: 30 mins Servings: 8 For these burgers, Martha loves Milton Creamery's Prairie Breeze cheddar and Challerhocker Swiss, both available at Murray's Cheese. Grate the horseradish and add it to the cheeses right before grilling; it quickly loses its potency once grated. Ingredients 1 ½ cups coarsely grated aged cheddar (4 ½ ounces) 1 ½ cups coarsely grated aged Swiss (5 ounces) 5 teaspoons freshly grated horseradish, or prepared horseradish to taste 3 pounds grass-fed ground beef chuck (85 percent lean) Coarse salt and freshly ground pepper Safflower oil, for brushing ½ cup mayonnaise 3 tablespoons ketchup 8 brioche buns, split 4 tablespoons unsalted butter, melted 8 slices (¼-inch-thick) large, ripe red tomato 16 slices crisp-cooked bacon (1 pound) 8 small lettuce leaves Bread-and-butter pickle slices Directions Preheat grill to medium. Combine both cheeses and horseradish. Gently form beef into 8 patties, each about 4 inches in diameter. Season generously with salt and pepper. Brush grates with oil; grill burgers 4 minutes. Flip; top each with just over 1/4 cup cheese mixture. Cover grill and cook, about 4 minutes more for medium-rare. Remove burgers from grill; let rest 5 minutes before assembling. Combine mayonnaise and ketchup. Brush split sides of buns with butter; grill until lightly toasted. Season tomato with salt and pepper. Sandwich burgers in buns with mayonnaise mixture, tomato, bacon, lettuce, and pickles. Print