Food & Cooking Recipes Lunch Recipes Test Kitchen's Favorite Grilled Cheese Be the first to rate & review! By Martha Stewart Test Kitchen Martha Stewart Test Kitchen The recipes developed by our test kitchen team have undergone a rigorous process of development and testing, ensuring that every element is optimal, from ingredient amounts to method and cooking time. This process includes triple-testing recipes to ensure they meet our high standards. The many stellar cooks and food editors who have been part of our team include Sarah Carey, Lucinda Scala Quinn, Jennifer Aaronson, Shira Bocar, Anna Kovel, Greg Lofts, Riley Wofford, Lauren Tyrell, and Lindsay Leopold. Editorial Guidelines Updated on September 6, 2018 Rate Print Share Prep Time: 20 mins Total Time: 25 mins Servings: 4 Our trick to getting this beloved sandwich just right? Slather the bread with a combination of butter and mayonnaise. The former imparts rich buttery flavor, while the latter ensures an uber-crisp exterior and perfect golden-brown crust. Serve with bowls of Creamy Tomato Soup. Ingredients 8 (½-inch-thick) slices sourdough sandwich bread, such as Pullman 3 tablespoons unsalted butter, room temperature 3 tablespoons mayonnaise 6 slices American cheese (3 ounces) 3 ounces sharp cheddar cheese, shredded (1 cup) Directions Arrange bread in a single layer on a clean work surface. Stir together butter and mayonnaise. Spread mixture evenly onto one side of every slice (1 scant tablespoon per slice). Heat a large skillet, preferably cast iron, over medium. Flip over bread on work surface (so it's plain-side up). Place 1 1/2 slices American cheese on 4 slices, and 1/4 cup cheddar on remaining 4 slices. Carefully sandwich together. Place sandwiches in skillet (in two batches, if needed). Reduce heat to medium-low; gently top sandwiches with a lid slightly smaller than skillet for even cooking. Cook, flipping once halfway through, until crisp and golden on both sides and cheese is melted, 7 to 9 minutes. Serve immediately. Sidney Bensimon Originally appeared: Martha Stewart Living, September 2018 Rate It Print