This ultimate sourdough grilled cheese sandwich combines a rich-four cheese blend and the rustic, hearty sourdough bread. It's easy, gooey and perfectly crispy!
Generously smear softened butter on both sides of the slices of bread, ensuring an even coating.
Select a large skillet that can comfortably accommodate two sandwiches side by side without overlapping. If your skillet is not large enough, cook the sandwiches one at a time. Lightly grease the skillet with butter.
Place the bottom pieces of bread. Layer the cheeses: start with the cheddar, followed by mozzarella, then shredded Gouda, and finish with a sprinkle of grated Parmesan cheese. Equally divide the cheeses between both sandwiches.
Optionally season with a pinch of sea salt and cracked black pepper. Top with the second slice of buttered bread, then transfer the pan to the stove.
Set the heat to low and cover the pan with a lid. Allow the sandwich to cook for 3-4 minutes, or until the bottom is golden brown. Keep a close watch to prevent burning.
Carefully flip the sandwich using a spatula, re-cover the pan, and continue cooking for an additional 2-3 minutes, or until the second side is also golden and the cheese is thoroughly melted. The pan will be hot now so this side will brown faster.
Transfer the sourdough grilled cheese to a plate and garnish with chopped fresh basil and an extra sprinkle of grated Parmesan. Pair it with a bowl of Tomato Basil Soup and enjoy!
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Notes
Feel free to experiment with various cheese combinations, but aim to pair a bold, flavorful cheese like Cheddar or Gruyère with a melting cheese such as Gouda or Mozzarella. Using at least two types of cheese will give the best results. For inspiration, check out my suggested cheese combos.
If preferred, mayonnaise can be used instead of butter on the bread.
Keep the heat low so the bread toasts evenly and the cheese melts all the way. Adjust as needed to prevent burning.
This sourdough grilled cheese sandwich recipe will also work in a toaster oven or an air fryer.
This sandwich is best enjoyed immediately, but if you have leftovers, store them in an airtight container in the refrigerator for up to 1 day. Reheat in a skillet to crisp up.