Classic avocado tuna melt with avocado, tomato, tuna salad, and melty Muenster cheese on crunchy toasted whole grain bread. Ready in about 15 minutes, this warm, cheesy open-faced sandwich is an easy, flavorful upgrade from the usual tuna sandwich.
🧾 Avocado Tuna Melt Backstory
The tuna melt is a classic lunch favorite. Craving one, I decided to elevate the sandwich by adding avocado and tomato for creaminess and brightness, and using Muenster cheese for its excellent melting quality. The result is a simple but special open-faced melt that feels a little upscale while still being quick and approachable.
🥘 Ingredients Needed
- Whole grain bread (or your favorite bread)
- White chunk albacore tuna (canned)
- Mayonnaise (regular or light)
- Dried dill for freshness
- Onion flakes, garlic powder, and paprika for seasoning
- Avocado, peeled and sliced
- Tomato, sliced
- Muenster cheese slices (or any good melting cheese)
This recipe is quick, family-friendly, and nutritious—perfect for a busy lunch or a simple weeknight meal.
🔪 Instructions
- Lightly toast the bread until golden and crisp.
- Make the tuna salad: combine tuna, mayonnaise, dried dill, onion flakes, garlic powder, and paprika in a medium bowl.
- Place toasted bread on a baking sheet and arrange avocado slices on each slice.
- Top avocado with tomato slices.
- Spread the tuna salad over the tomato.
- Place a slice of Muenster cheese over the tuna.
- Broil on high for 3–4 minutes until the sandwich is hot and the cheese is melted. Watch closely to avoid burning.
- If you don’t have a broiler, warm in a covered skillet over medium heat for 2–3 minutes until the cheese melts.
💠Top Tips
How to make the perfect avocado tuna melt every time
- Use fresh bread and ripe (but not overripe) avocado and tomato for the best texture and flavor.
- If you won’t use the avocado immediately, choose one that’s still slightly firm; refrigerate ripe avocados to extend usability by a day or two.
- Toast the bread thoroughly for a satisfying crunch that contrasts the creamy avocado and tuna salad.
- Spread the tuna salad edge to edge so each bite has balanced flavor and texture.
👪 FAQs
An open-faced sandwich of tuna salad on toasted bread topped with avocado, tomato, and melted cheese. It combines creamy, bright, and savory elements for a satisfying bite.
Yes. Heat the sandwich in a covered skillet over medium heat for 2–3 minutes until the cheese begins to melt. The lid traps heat and helps melt the cheese evenly.
Canned tuna is a lean source of protein and provides omega-3 fatty acids. Choose products and packaging you prefer and check labels for added oils or sodium.
Stored in the refrigerator, tuna salad is best eaten within three days.
📖 Variations
- Use your favorite tuna salad recipe in place of the base version here.
- Substitute shredded cooked chicken, rotisserie chicken, or canned chicken for a different protein.
- Try a chickpea salad for a meatless option.
- Add fresh arugula after melting the cheese for peppery greens and extra color.
🥗 Suggested Side Dishes
Keep sides simple so the sandwich shines: chips and a dill pickle are classic choices. A cold pasta salad also pairs nicely for a heartier meal.
More favorite sandwiches
If you enjoy melty sandwiches, try other grilled or baked variations with chicken, chili and cheese, or classic grilled cheese combinations for more inspiration.
📋 Recipe Card
Avocado Tuna Melt
Ingredients
- 4 slices whole grain bread
- 15 ounces white chunk albacore tuna (about 3 cans)
- 3½ tablespoons mayonnaise
- ¼ teaspoon dried dill
- ¼ teaspoon onion flakes
- ¼ teaspoon garlic powder
- ¼ teaspoon paprika
- 1 avocado, peeled and sliced
- 1 large tomato, sliced
- 4 slices Muenster cheese
Instructions
- Lightly toast each slice of bread.
- While the bread toasts, combine tuna, mayonnaise, dill, onion flakes, garlic powder, and paprika in a medium bowl to make the tuna salad.
- Place toasted bread on a baking sheet and arrange avocado slices across the slices.
- Top avocado with tomato slices.
- Spread the tuna salad evenly over the tomato.
- Place a slice of cheese over each sandwich.
- Broil on high for 3–4 minutes until the sandwich is hot and the cheese has melted. Watch carefully to prevent burning. Alternatively, heat in a covered skillet over medium heat for 2–3 minutes until the cheese melts.
Notes
- Pick avocados based on when you’ll use them: firmer for later use, slightly soft for immediate use. Refrigerate ripe avocados to extend freshness by a day or two.
- Don’t skip toasting the bread—the crunch contrasts nicely with the creamy tuna and avocado.
- If you lack a broiler, use a covered skillet to melt the cheese.
Nutrition (per serving, estimate)
Calories: 314 kcal | Carbohydrates: 6 g | Protein: 26 g | Fat: 20 g | Sodium: 495 mg
Nutritional information is an estimate and may vary based on specific ingredients and portion sizes.
Update Notes: Originally published in August 2014; updated with tips, photos, and a recipe tweak in August 2020.
Thanks for reading — happy cooking!
