Sun-Dried Tomato Bacon Pesto Grilled Cheese

This sun-dried tomato bacon pesto grilled cheese combines crispy bacon, rich basil pesto, and tangy sun-dried tomatoes with melted mozzarella on perfectly toasted sourdough.

Why This Recipe Works:

• Mayonnaise has a higher smoke point than butter, ensuring a perfectly golden, crispy crust without scorching.
• Mixing the pesto directly with shredded cheese prevents the oil from separating and making the bread soggy.
• Thick-cut bacon provides a smoky, crunchy contrast to the soft, melted low-moisture mozzarella.

I still remember the rainy Tuesday afternoon I burned my favorite cast-iron skillet trying to force-melt a block of cold cheddar between two stale slices of sandwich bread. My wrists literally ached from pressing down with a heavy metal spatula, hoping sheer physical force would make up for my lack of patience.

It was a greasy, charred disaster.

If you love a classic bacon grilled cheese sandwich, you know how tricky it is to balance fillings. Most people use cold, thick-cut cheese that burns the bread before melting, while wet pesto turns the crumb into a soggy, sad mess.

Bear with me here, because the science of this is actually quite simple. By shredding low-moisture mozzarella and mixing it directly with the pesto, you lock the oil-soluble flavor compounds into the melting protein matrix. Then, we paint the outside of our sourdough with mayonnaise instead of butter—trust me on this one—because the egg yolks in mayo create an absolutely perfect, evenly browned crust that won't burn as easily.

Let's build the ultimate sandwich.

Sun-Dried Tomato Bacon Pesto Grilled Cheese

• Publisher Storied Skillet
• Cuisine American
• Category Lunch, Dinner
• Prep Time 10 minutes
• Cook Time 10 minutes
• Servings 2
• Calories 650 calories
• Rating 4.8 5060
• Tags grilled cheese, pesto grilled cheese, bacon grilled cheese, sun-dried tomato

Ingredients

• 4 slices sourdough bread
• 4 tbsp basil pesto
• 1/2 cup sun-dried tomatoes (drained and chopped)
• 6 slices thick-cut bacon (cooked until crispy)
• 1.5 cups low-moisture mozzarella cheese (shredded)
• 3 tbsp mayonnaise (for spreading)
• 1/4 tsp Diamond Crystal kosher salt

Directions

1. Lay the sourdough slices on a clean cutting board and spread a thin, even layer of mayonnaise on one side of each slice.
2. Flip two of the slices over. Spread 2 tablespoons of basil pesto on the un-mayonnaissed side of each of these slices.
3. Sprinkle half of the shredded mozzarella cheese over the pesto layer, pressing it down slightly with your fingers.
4. Arrange the crispy bacon slices and chopped sun-dried tomatoes evenly over the cheese.
5. Top with the remaining mozzarella cheese, then place the remaining bread slices on top, mayonnaise-side facing up.
6. Heat a heavy cast-iron skillet over medium-low heat for 3 minutes to ensure even thermal mass distribution.
7. Place the sandwiches in the dry skillet and cook for 4 to 5 minutes per side, pressing gently with a spatula, until the bread is deeply golden brown and the cheese is fully melted.

Notes

• We highly recommend using Diamond Crystal kosher salt; if you are using fine table salt, cut the volume in half (use 1/8 teaspoon instead of 1/4 teaspoon).
• Low-moisture mozzarella is crucial here because its tight protein matrix melts smoothly without releasing excess water, unlike fresh mozzarella which will make your bread soggy.
• Keep your burner on medium-low; rushing the heat will scorch the mayonnaise crust before the cheese in the center has a chance to melt.
• Once cooked, this sandwich does not store well in the fridge as the bread will lose its crispness; if you must save leftovers, reheat them in a dry skillet or air fryer to restore the crunch.

Serving Suggestions

This decadent sandwich is a meal in itself, but you can easily turn it into a gourmet feast with the right accompaniments.

• A warm bowl of classic tomato basil soup for dipping.
• A crisp, refreshing side salad like our cucumber sweet pepper salad.
• A handful of salty, kettle-cooked potato chips.
• A cold glass of homemade mango iced tea to balance the rich flavors.
• A side of roasted vegetables, such as our creamy garlic parmesan broccoli.

Storage and Reheating

Let's be completely honest: grilled cheese is always best eaten straight out of the skillet while the cheese is still stretchy and hot. If you do end up with leftovers, wrap them tightly in aluminum foil and store them in the refrigerator for up to two days.

Do not use the microwave.

Microwaving will turn your beautiful, crispy sourdough into a rubbery, sad sponge. Instead, heat a dry cast-iron skillet over medium-low heat and place the leftover sandwich inside.

Cover the pan with a lid for three minutes to trap the heat and melt the cheese, then remove the lid and flip to crisp up the crust. Alternatively, pop it into an air fryer at 350°F (175°C) for about four minutes until it sizzles.

It will taste almost brand new.

Ingredient Substitutes

If you don't have all these exact ingredients on hand, don't panic. Here are some easy swaps that work beautifully:

1. The Bread: If you don't have sourdough, a thick-cut Italian bread or even a sturdy brioche works wonderfully.
2. The Cheese: Swap mozzarella for provolone, fontina, or gruyère for a sharper flavor profile.
3. The Pesto: If you run out of basil pesto, try a sun-dried tomato pesto or even a spread of olive tapenade.
4. The Bacon: For a vegetarian version, swap the bacon for grilled zucchini slices or simply omit it entirely.

I hope this sandwich brings a little bit of warm, crispy joy to your kitchen today. Grab your favorite skillet, take your time with the heat, and enjoy every single cheesy, smoky bite!