The Tuna Melt That’s Way More Than a Sandwich With Warm Cheese

The tuna melt has kind of a questionable reputation. It’s supposed to be a better version of a classic tuna fish sandwich, but it somehow comes feels like it’s always worse. Or at least…not quite right. And it’s usually because the heating of the bread, with all that moist tuna salad just comes out more gloppy than fancy. The difference between a bad tuna melt and a good tuna melt is massive. But you can make a great version of a tuna melt with just a few super simple steps along the way.

Before we get into it, let’s just make sure you’re going to use an oven and not a microwave. We have heard horror stories of people trying to make micorwaved tuna melts and that are scarier than any Halloween ghost story. You need an oven!

And to give you the Clif’s Notes version of how to make a top notch tuna melt: drain the tuna as much as you can. The drier the tuna salad the better the tuna melt. Then only toast the bread halfway before adding the cheese. Why? Because it finishing it (open-faced) under a broiler for thirty seconds will give you some nicely toasted cheesy bits that make all the difference.

The Short Version

• The gist: A diner-style open-faced tuna melt with crisp half-toasted bread, a tangy tuna mixture, and properly melted cheese.
• Why it works: draining the tuna hard keeps the bread from getting soggy; half-toasting first gives it structure; a short broil gives the cheese that golden-spotted finish.
• Time: 15–20 minutes, mostly hands-off.
• Key tips: drain until no more liquid comes out, half-toast the bread before assembling, and don’t walk away during the broil.

Ingredients

• Tuna (1 can, drained very well): Oil-packed has more flavor. Water-packed works if you bump the mayo up slightly.
• Mayo (2 tablespoons): Or 1 tbsp mayo plus 1 tbsp plain Greek yogurt for a lighter mix that still binds.
• Lemon juice (a squeeze): Fresh. Brightens the tuna and cuts the richness of the cheese.
• Dijon mustard (1 teaspoon): A little sharpness and acid. Whole-grain mustard also works.
• Salt and black pepper: Pinch of salt; generous pepper.
• Celery (1–2 tbsp, finely chopped, optional): For crunch.
• Onion (1–2 tbsp, finely chopped, optional): Yellow, red, or sweet. Mince small.
• Bread (2–4 slices): Sourdough, rye, or a hearty white. Avoid super-soft sandwich bread.
• Cheese (2–4 slices, or 1/2–1 cup shredded): Sharp cheddar is classic; American gives the diner melt; Swiss leans elegant.
• For serving: Pickles, red onion, hot sauce, dill, sliced tomato, or arugula.

I am an oil tuna fish person all the way. I think the water tends to make it bland, and I think the oil really adds to the texture of it as well, in addition to making it richer. If I’m being honest, I’ve never understood the whole water tuna cans. I’m not sure who buys those. I’m not sure who wants those. I’m not sure who would choose water over oil when it comes to making a tuna fish salad. If you’re a water tuna person out there, let us know why. Let us know if we’re missing something or if we’re looking at it all the wrong way.

Instructions

Use a sheet pan and an oven (or toaster oven) preheated to 425°F, or a non-stick skillet for the more hands-on version. Keep a small bowl for mixing, a fork for mashing, and a butter knife for spreading.

1) Mix the tuna. Drain the can hard — press the lid down over the sink until no more liquid comes out, or the bread will go mushy. Combine with 2 tablespoons mayo (or the mayo-yogurt mix), a squeeze of lemon, 1 teaspoon Dijon, and salt and pepper to taste. Stir in the chopped celery and onion if using.

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2) Half-toast the bread. This is what separates a tuna melt from hot cheese on bread. Toast the slices on a sheet pan at 425°F for 3–4 minutes (or a lower toaster setting) — set and lightly golden, not fully browned, since they’ll keep cooking under the cheese.

3) Top the toast with the tuna. Spread the mixture all the way to the edges — bare edges scorch while the center stays cold.

4) Add the cheese. A thick slice on each, or a small handful of shredded. Sharp cheddar is classic, American gives the diner-style melt, Swiss is more elegant.

5) Melt the cheese. Bake about 4–6 minutes at 425°F until fully melted, then pull it out. Skillet option: set the open-faced toast in an un-oiled non-stick skillet over medium-low for 2–3 minutes.

6) Broil for the finish. For the golden, bubbling, diner-style top, broil 30–60 seconds. Stay right there — cheese goes from perfect to smoke-alarm in about nine seconds.

7) Garnish and serve. Add any of: pickles, red onion, hot sauce, dill, sliced tomato, or arugula. Eat immediately.

Spins and Swaps

• Chickpea melt: Drain and rinse a can of chickpeas, mash with a fork until it mimics tuna, mix the same way. Vegetarian and surprisingly satisfying.
• Tuna patty melt: Build it closed-face on rye with caramelized onions inside, then grill in a buttered skillet, both sides, until golden.
• Spicy: Add 1 tsp sriracha or 1/4 tsp cayenne to the mix; pickled jalapeños on top.
• Mediterranean: Add chopped Kalamata olives and capers; skip the cheddar for feta or fresh mozzarella.
• Avocado: Mash half an avocado into the tuna for a creamier base.

I really like making tuna melts. They are a fantastic, simple, easy to make dish that elevates the boring old tuna fish. And it can also be added to, to take it even higher and more to your tastes. Do you like peppers? Shallots? Cornichons? You can add anything to it you want because the first rule of tuna melts is that there are no rules. Personally, I love pepperoncinis. I put them on everything. Literally. They are the perfect blend of tangy and spicy without being overbearing. I add a handful of sliced pepperoncinis and it really adds a lot of zing.

What Goes Alongside

• Kettle chips and a pickle spear — the diner default.
• Tomato soup, the most underrated melt pairing.
• A small green salad with lemon vinaigrette.
• Pickled vegetables: pepperoncini, banana peppers, dill spears.
• Iced tea or a cold beer.

Kitchen Notes

• You need to use oil-packed tuna. Oil-packed tuna is typically much more flavorful and tender than water-packed. And you’ll be draining off most of the oil anyway.
• Don’t use super soft white bread. Use a nice sturdy bread that candle the moist tuna salad and some crispy toasting.
• While sharp cheddar is delicious and always works, a blend of sharp cheddar and Monterey Jack or even fontina will give you a nice photo-worthy stretch.
• Never take your eyes off the broil. Cheese can go from perfect to charred in a matter of seconds. 
• A tuna salad that’s been sitting in the fridge for a day or two has had a chance to meld and ups the flavor. Pull it from the fridge for at least 10 minutes before making so it’s easier to spread. 

How healthy is a tuna melt? While tuna has some mercury concerns (don’t eat it too often!), it’s pretty healthy as long as you don’t go crazy with the mayo. Adding some greens like arugula are also great for upping the health quotient and providing a nice bite that counterbalances the creamy mayo and cheese.

The Last Word

Making a tuna melt the right way will remind you just how good this sandwich can be. You won’t even remember the soggy cafeteria versions you had as a kid. 

The tuna melt can be as good as you want it to be. Is it comfort food? Yes. But that doesn’t mean you can’t make it fancy. Add caviar if you’re feeling crazy. Remember when we said there’s no rules?

Cory Jones

Cory Jones has spent 20 years in media and publishing and now leads the data and editorial operation behind The Greenest. He built and maintains the site’s Neighborhood Wellness Score — a proprietary dataset scoring food access, walkability, air quality, healthcare access, and health outcomes across 18,356 U.S. ZIP codes, drawing on CDC PLACES data, EPA air quality readings, and verified location intelligence. He is a huge fan of Rancho Gordo beans and tries to work out more than he actually works out.