1-Gather and Prep Your Ingredients First, pull together your ingredients: 2 slices of sourdough bread, a thin layer of mayonnaise for the outside, Dijon mustard for one inside slice, grated sharp cheddar and Gruyère or raclette cheeses (28 to 56 grams each), and butter to coat the pan. Preparation takes about 5 minutes, so take your time to spread things evenly. This step sets the stage for a sandwich that cooks up perfectly.

2-Assemble the Sandwich Spread mayonnaise on the outer sides of both bread slices for that golden crisp. Flip one slice over and add Dijon mustard on the inside, then layer the grated cheeses evenly over it. Close the sandwich with the other slice, making sure the mayonnaise side faces out. It’s that simple twist that makes the flavor pop.

3-Cook to Perfection Heat a nonstick or cast-iron skillet over medium-low heat and melt butter to coat the pan this takes just a minute. Place your sandwich in the pan, cover it, and cook for 2 to 3 minutes until the bottom is golden and crisp. Flip it, cover again, and cook the other side for 1 to 3 minutes until the cheese melts fully. If the bread starts browning too fast, lower the heat to keep everything even.

4-Final Touches Once it’s done, remove the sandwich, let it cool for a minute, and slice it up. You can add seasonings or veggies for extra flair, and it works great with dietary tweaks like vegan cheese. This method keeps the grilled cheese versatile and delicious every time.