Spicy Tuna Melt Sandwich

Featured in: Cozy Bread Recipes

This spicy tuna melt combines drained canned tuna mixed with mayonnaise, sriracha, Dijon mustard, celery, and red onion for a flavorful salad. Spread the mixture on buttered sourdough bread, top with shredded cheddar cheese and optional tomato slices, then cook in a skillet until golden and melted. Ready in just 20 minutes, it's a satisfying pescatarian sandwich that serves four.

Updated on Sun, 18 Jan 2026 12:26:00 GMT
The finished Spicy Tuna Melt on a plate, featuring golden sourdough bread oozing with melted cheddar cheese and a visible layer of red onion and tuna salad. Save to Pinterest
The finished Spicy Tuna Melt on a plate, featuring golden sourdough bread oozing with melted cheddar cheese and a visible layer of red onion and tuna salad. | flourhollow.com

My neighbor knocked on the door one rainy Tuesday holding a jar of homemade sriracha and a can of tuna. She said her pantry was boring and asked if I could help her make lunch interesting. We stood in my kitchen, tossing ideas around, and I remembered how my college roommate used to doctor up canned tuna with whatever hot sauce we had lying around. That afternoon, we made these melts, and the smell of toasted sourdough mixed with spicy, creamy tuna filled the whole house.

I started making these for my kids on weekends when they wanted something quick but refused to eat plain sandwiches. They loved watching the cheese bubble and ooze out the sides as the bread crisped up in the skillet. Now they ask for spicy tuna melts by name, and I catch them sneaking extra sriracha into the mix when they think I am not looking.

Ingredients

  • Tuna in water: Drain it really well by pressing it with a fork against the side of the strainer, or your salad will be watery and sad.
  • Mayonnaise: This is the creamy base that holds everything together, so do not skimp or the filling will be dry.
  • Sriracha or hot sauce: Start with one tablespoon and taste before adding more, because some brands are way hotter than others.
  • Dijon mustard: It adds a sharp tang that balances the richness of the mayo and cuts through the heat.
  • Celery: Chop it fine so you get little pockets of crunch without big, awkward pieces that fall out.
  • Red onion: The sharpness mellows as it sits in the salad, and it adds a slight sweetness that plays well with the spice.
  • Fresh parsley: Optional, but it brightens the whole thing and makes it feel a little less like a bachelor meal.
  • Sourdough bread: The tangy flavor and sturdy texture hold up to the moist filling and get beautifully crispy when toasted.
  • Butter: Spread it all the way to the edges so every inch of bread gets golden and crunchy in the pan.
  • Cheddar cheese: It melts into gooey perfection, but swap in pepper jack if you want to double down on the heat.
  • Tomato: Adds a juicy freshness that cuts through the richness, though I skip it if my tomatoes are not ripe.

Instructions

Mix the spicy tuna salad:
Combine the drained tuna, mayo, sriracha, mustard, celery, onion, parsley, salt, and pepper in a bowl, breaking up any big chunks with your fork. Taste it and adjust the heat or salt, because this is your chance to get it exactly how you like it.
Prep the bread:
Lay out all eight slices and butter one side of each, making sure to reach the corners. Flip four slices so the unbuttered side faces up, then divide the tuna salad evenly among them.
Build the sandwiches:
Sprinkle the shredded cheese over the tuna, and add tomato slices if you are using them. Top with the remaining bread slices, buttered side facing out, and press gently so everything sticks together.
Toast until golden:
Heat a large skillet over medium heat and place the sandwiches in carefully, working in batches if needed. Cook for three to four minutes per side, pressing down lightly with a spatula, until the bread is golden brown and the cheese is melted and gooey.
Serve hot:
Slice each sandwich in half and serve immediately while the cheese is still stretchy and warm. Pair with pickles or a simple salad if you want something crisp on the side.
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One evening, I made these for a friend who had just moved into a new apartment with nothing but a hot plate and a single pan. We sat on her floor surrounded by unpacked boxes, eating spicy tuna melts off paper towels, and she said it was the best meal she had eaten in weeks. Sometimes comfort food is less about the recipe and more about the moment it fills.

Choosing Your Cheese

Cheddar is reliable and melts beautifully, but pepper jack turns this into a seriously spicy sandwich if you are into that. I have also used Havarti when I wanted something creamy and mild, and it worked great. Just avoid pre-shredded cheese with anti-caking powder if you can, because it does not melt as smoothly as cheese you shred yourself.

Making It Your Own

You can swap the sourdough for whole wheat, rye, or even a good crusty ciabatta if that is what you have. I have added sliced pickles inside the sandwich for extra tang, and once I threw in some thinly sliced avocado, which was rich and creamy against the spice. If you do not have sriracha, any hot sauce works, or even a pinch of cayenne mixed into the mayo.

Storing and Reheating

The tuna salad keeps in the fridge for up to two days, so you can make it ahead and assemble sandwiches as you need them. I do not recommend making the whole sandwich in advance because the bread gets soggy, but if you have leftovers, reheat them in a dry skillet over low heat to crisp them back up. The microwave will make them sad and rubbery, so avoid that if you can.

  • Store leftover tuna salad in an airtight container and give it a stir before using.
  • If you want to meal prep, keep the components separate and assemble fresh each time.
  • Freeze the tuna salad if you need to, but let it thaw completely and drain any extra liquid before using.
Close-up of a Spicy Tuna Melt cut in half, revealing the warm, zesty tuna filling with celery and a generous amount of melted pepper jack cheese. Save to Pinterest
Close-up of a Spicy Tuna Melt cut in half, revealing the warm, zesty tuna filling with celery and a generous amount of melted pepper jack cheese. | flourhollow.com

This sandwich has become my answer to lazy Sundays and unexpected guests, and it never disappoints. I hope it brings you the same easy comfort it has brought my kitchen.

Recipe FAQs

Can I use fresh tuna instead of canned?

Yes, you can use cooked fresh tuna. Use about 1 pound of cooked, flaked tuna and follow the same mixing process. The texture will be slightly different but equally delicious.

How spicy is this sandwich?

The heat level depends on your sriracha or hot sauce choice and quantity. Start with 1 tablespoon and adjust upward for more spice. Pepper jack cheese adds additional heat if desired.

What can I substitute for sourdough bread?

Whole wheat, rye, or ciabatta bread work well. You can also use regular white bread or brioche, though sourdough's tang complements the spicy tuna particularly well.

Can I prepare the tuna mixture ahead of time?

Absolutely. Mix the tuna salad up to 4 hours in advance and refrigerate in an airtight container. Assemble and cook the sandwiches fresh for best results.

What sides pair well with this sandwich?

Pickles, potato chips, a crisp green salad, or coleslaw complement the sandwich nicely. A cold beverage like iced tea or lemonade balances the spicy flavors well.

How do I prevent the bread from getting soggy?

Drain the tuna thoroughly before mixing, and don't overmix the salad as it releases excess moisture. Use a sturdy bread like sourdough that can withstand the filling and melting process.

Spicy Tuna Melt Sandwich

Zesty tuna salad with spicy kick and melted cheddar on toasted sourdough. A quick comfort sandwich.

Prep Duration
10 mins
Cook Duration
10 mins
Overall Time
20 mins
Created by Megan Turner


Skill Level Easy

Cuisine Type American

Serves 4 Servings Count

Dietary Details None specified

Ingredient List

Spicy Tuna Salad

01 2 cans (5 oz each) tuna in water, drained
02 1/3 cup mayonnaise
03 1 tablespoon sriracha or hot sauce
04 1 tablespoon Dijon mustard
05 1 celery stalk, finely chopped
06 1 small red onion, finely chopped
07 1 tablespoon fresh parsley, chopped
08 Salt and black pepper to taste

Sandwich Assembly

01 8 slices sourdough bread
02 2 tablespoons unsalted butter, softened
03 1 cup shredded cheddar cheese
04 1 medium tomato, thinly sliced

Steps

Step 01

Prepare Tuna Mixture: In a mixing bowl, combine drained tuna, mayonnaise, sriracha, Dijon mustard, celery, red onion, parsley, salt, and black pepper. Mix thoroughly until evenly incorporated.

Step 02

Butter the Bread: Arrange sourdough bread slices and butter one side of each slice evenly.

Step 03

Assemble Sandwich Bases: Lay 4 slices with unbuttered side facing up. Divide spicy tuna salad evenly among them. Top each with shredded cheddar cheese and tomato slices.

Step 04

Complete Sandwiches: Place remaining bread slices on top with buttered side facing outward, pressing gently to secure.

Step 05

Toast Sandwiches: Heat a large nonstick skillet or griddle over medium heat. Place sandwiches in skillet and cook 3 to 4 minutes per side, pressing gently, until bread is golden brown and cheese is melted.

Step 06

Serve: Transfer sandwiches to a cutting board, slice diagonally in half, and serve immediately while hot.

Equipment Needed

  • Mixing bowl
  • Spoon or spatula
  • Knife and cutting board
  • Large nonstick skillet or griddle
  • Spatula

Allergy Info

Review every ingredient to spot potential allergens. Always confirm with your healthcare provider if unsure.
  • Contains fish (tuna)
  • Contains eggs (mayonnaise)
  • Contains wheat (bread)
  • Contains milk (cheese and butter)

Nutrition Breakdown (per serving)

Nutrition details are for reference and can't substitute for professional advice.
  • Caloric Value: 420
  • Fat content: 23 g
  • Carbohydrates: 32 g
  • Protein Amount: 27 g