Tuna Melt Classic Sandwich

Featured in: Everyday Home Meals

This classic open-faced tuna melt brings together creamy tuna blended with mayonnaise, Dijon mustard, celery, and onion, spread generously over toasted hearty bread. It’s layered with fresh tomato slices and topped with melted cheddar cheese, broiled to a golden bubbly finish. Perfect for a quick lunch or light dinner, it offers a comforting combination of flavors and textures with minimal prep and cook time.

Updated on Sat, 10 Jan 2026 15:20:00 GMT
Golden, bubbly cheese melts atop a flavorful tuna melt sandwich, perfect for a quick, comforting lunch. Save to Pinterest
Golden, bubbly cheese melts atop a flavorful tuna melt sandwich, perfect for a quick, comforting lunch. | itrihouse.com

There's something about the smell of butter hitting hot bread that makes everything else fade away—that's when I knew the tuna melt had already won. My neighbor brought one over on a rainy Tuesday, and I remember being surprised by how the simple combination of canned tuna, melted cheese, and crispy bread could feel like actual comfort food, not just leftovers salvaged into a sandwich. Since then, it's become my go-to when I need something that feels both casual and satisfying, ready in under twenty minutes without any fuss.

I made these for my sister during her first week of a new job, and she ate two while telling me about her chaotic morning—something about the warm, melted cheese just made her relax. She's not usually one for seafood, but she kept reaching for another piece, asking between bites how I made it taste so different from the sad cafeteria version she remembered. That's when it clicked for me: a really good tuna melt isn't about fancy ingredients, it's about paying attention to the small things.

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Ingredients

  • Tuna in water: Two cans give you enough for four generous sandwiches, and draining them well keeps everything from getting soggy and waterlogged.
  • Mayonnaise: The binder that makes tuna salad creamy and rich; don't skip it or reduce it too much, or the whole thing falls apart.
  • Dijon mustard: Just a tablespoon adds a sharp, sophisticated note that keeps the sandwich from tasting one-dimensional.
  • Celery and red onion: These provide gentle crunch and brightness; don't chop them too fine or they disappear into the mayo.
  • Fresh parsley: Optional but worth it if you have it—adds a fresh green note that surprises people who expect tuna salad to be heavy.
  • Lemon juice: A teaspoon keeps everything tasting clean and prevents that canned-fish flavor from taking over.
  • Hearty bread: Sourdough or whole wheat stands up to moisture and broiling without falling apart; thin bread will burn before the cheese melts.
  • Cheddar cheese: Sharp cheddar is reliable, but Swiss and Gruyère bring more elegance if you want to dress it up.
  • Unsalted butter: For toasting the bread to golden perfection and adding richness without oversalting.

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Instructions

Mix your tuna base:
In a bowl, combine your drained tuna with mayo, mustard, the finely chopped celery, red onion, parsley, and lemon juice, then season with salt and pepper. Taste it as you go—this is your chance to adjust the flavors before everything gets toasted and melted together.
Prepare the bread:
Lay your bread slices on a baking sheet and lightly spread softened butter on one side of each. You want just enough to turn golden, not so much that it pools and burns.
Toast the bread:
Slide the sheet under a hot broiler for about a minute or two, butter side up, until the edges turn light golden. Watch it closely because broilers are moody and bread can blacken faster than you'd think.
Flip and spread:
Once the bread has some color, flip each slice over so the toasted side faces down, then generously spread your tuna salad across the top. The warm toast underneath will soften the edges of the salad just slightly, creating a better texture.
Add tomato and cheese:
Place a tomato slice on each sandwich and pile the shredded cheese on top, making sure it's distributed evenly so every bite has melted cheese.
Melt and finish:
Return everything to the broiler for three to five minutes, keeping your eye on it until the cheese is bubbling and the bread edges turn golden brown. The moment the cheese starts looking like molten gold with little brown freckles, pull it out.
Cool and serve:
Let it sit for just a minute so the cheese sets slightly and you don't burn your mouth, then serve while everything is still warm and the bread is crispy.
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| itrihouse.com

One afternoon, my daughter came home from school in a grumpy mood, barely responding to my questions about her day. I made one of these on impulse, and by the time she bit into it—the cheese still warm, the bread still crispy—something shifted. She started talking, actually talking, about what happened at lunch and why she felt left out, and somehow a tuna melt became the bridge between her closed-off silence and real conversation.

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Why the Broiler Works Best

The broiler creates an intense, focused heat from above that melts cheese quickly and crisps the bread at the same time, which an oven or toaster alone can't always do evenly. I tried pan-frying these once, thinking I could control the heat better, but the bread got greasy and the cheese took forever to melt through. The broiler's speed and directness are what make this sandwich come together in under twenty minutes without drying out the tuna salad or burning anything.

Cheese Matters More Than You'd Think

I used to grab whatever cheese was cheapest, and the sandwich was fine but forgettable. Then I tried a sharp aged cheddar, and suddenly the whole thing tasted intentional, with depth. Gruyère brings a nutty sophistication, Swiss adds a mild sweetness, and even pepper jack can work if you want a little heat. The cheese isn't just a topping—it's half the personality of the sandwich, so don't treat it like an afterthought.

Making It Your Own

The beauty of this recipe is that it's a canvas for whatever your kitchen has or your mood demands. I've added smoked paprika on days when I wanted something deeper, stirred in a little hot sauce when I needed spice, and once even mixed in some finely chopped capers because they were sitting in the pantry. The tuna salad stays forgiving as long as you keep the mayo and lemon juice as your anchors.

  • A pinch of smoked paprika or cayenne pepper adds warmth and complexity without overwhelming the tuna.
  • Try layering thin tomato slices with fresh basil if you want to channel something more summery.
  • Greek yogurt can replace half the mayo for a lighter version that still tastes rich.
A close-up shot of a classic tuna melt reveals creamy tuna and melted cheese on toasted bread. Save to Pinterest
A close-up shot of a classic tuna melt reveals creamy tuna and melted cheese on toasted bread. | itrihouse.com

These sandwiches are proof that the simplest meals often carry the most warmth. Once you've made one, you'll find reasons to make it again.

Recipe FAQs

What type of bread works best for a tuna melt?

Hearty breads like sourdough or whole wheat provide the perfect support and texture for the creamy tuna and melted cheese layers.

Can I use different cheeses for this dish?

Yes, Swiss, Gruyère, mozzarella, or pepper jack also melt well and add unique flavor variations.

How can I add extra flavor to the tuna salad?

Incorporate smoked paprika, hot sauce, or fresh herbs such as parsley to enhance the taste.

What is the best way to achieve a crispy top?

Broil the sandwich for a few minutes until the cheese bubbles and edges turn golden brown for a crisp finish.

Is there a lighter alternative for mayonnaise in the tuna mixture?

Substituting part of the mayonnaise with Greek yogurt reduces fat while maintaining creaminess.

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Tuna Melt Classic Sandwich

Open-faced tuna topped with creamy salad, tomato, and melted cheddar on toasted sourdough bread.

Prep Time
10 min
Cook Time
8 min
Total Duration
18 min
Recipe by Grace Ellington

Recipe Type Everyday Home Meals

Skill Level Easy

Cuisine type American

Makes 4 Serving Size

Dietary notes None specified

What You'll Need

Tuna Salad

01 2 cans (5 oz each) tuna in water, drained
02 1/4 cup mayonnaise
03 1 tablespoon Dijon mustard
04 1 celery stalk, finely chopped
05 2 tablespoons red onion, finely chopped
06 1 tablespoon fresh parsley, chopped (optional)
07 1 teaspoon lemon juice
08 Salt and black pepper to taste

Sandwich

01 4 slices hearty bread (sourdough or whole wheat)
02 4 slices tomato
03 1 cup (about 4 oz) shredded cheddar cheese (or Swiss, Gruyère)
04 2 tablespoons unsalted butter, softened

How to Make It

Step 01

Prepare Tuna Salad: In a medium bowl, combine the tuna, mayonnaise, Dijon mustard, celery, red onion, parsley (if using), lemon juice, salt, and black pepper. Mix thoroughly until fully blended.

Step 02

Preheat Broiler: Set your oven broiler or toaster oven to broil and allow to preheat.

Step 03

Toast Bread with Butter: Place bread slices on a baking sheet. Lightly spread softened butter on one side of each slice. Place the buttered side up under the broiler for 1 to 2 minutes until golden brown, then remove from oven.

Step 04

Assemble Open-Faced Sandwiches: Flip the toasted bread slices so the toasted side is down. Evenly spread prepared tuna salad on each slice. Layer one tomato slice on top, then generously sprinkle shredded cheese over each assembly.

Step 05

Melt Cheese and Brown Edges: Return the baking sheet to the broiler. Broil for 3 to 5 minutes, monitoring closely until cheese melts completely and bubbles with golden brown edges.

Step 06

Serve: Remove from oven and allow to cool slightly before serving warm.

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Tools You'll Need

  • Mixing bowl
  • Spoon or spatula
  • Baking sheet
  • Oven or toaster oven
  • Knife and cutting board

Allergy info

Review ingredients for allergens. Reach out to a healthcare expert if unsure.
  • Contains fish, eggs, dairy, and gluten. Verify ingredient labels for cross-contamination risks.

Nutrition Info (per serving)

For your reference only. Always confirm with a medical provider.
  • Caloric Value: 370
  • Fat content: 20 g
  • Carbohydrates: 26 g
  • Protein amount: 22 g

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