The Keto Tuna Melt (Low Carb) is proof that comfort food and clean eating can absolutely coexist. Classic tuna melts are loved for their creamy, cheesy filling and crisp exterior, but they usually rely on bread that sends carbs skyrocketing. This keto version keeps everything people love about a traditional tuna melt—the rich tuna salad, gooey melted cheese, and savory seasoning—while completely eliminating the high-carb bread component. The result is a deeply satisfying, protein-packed meal that fits seamlessly into a ketogenic or low-carb lifestyle.
This recipe is especially popular because it’s fast, budget-friendly, and incredibly flexible. Whether you’re cooking lunch for one, prepping meals for the week, or serving a light dinner, the keto tuna melt delivers big flavor with minimal effort. It can be made in a skillet, oven, or air fryer and served on keto bread, cloud bread, chaffles, portobello mushrooms, or even lettuce wraps. If you’re looking for a low-carb recipe that feels indulgent yet nourishing, this one deserves a permanent spot in your rotation.
Ingredients
Equipment
Method
- In a mixing bowl, add the drained tuna and flake it with a fork. Add mayonnaise, Dijon mustard, lemon juice, celery, red onion (if using), garlic powder, onion powder, salt, black pepper, and paprika. Mix until everything is well combined and creamy but not mushy.
- If using keto bread or chaffles, lightly toast them for better structure. If using portobello mushrooms, wipe them clean and lightly roast or pan-cook to remove excess moisture. For lettuce wraps, wash and dry the leaves thoroughly.
- Spread a generous layer of the tuna mixture onto your chosen base. Top with shredded or sliced cheddar cheese and mozzarella if using.
- Heat a non-stick skillet over medium-low heat with butter or oil. Place the assembled tuna melt in the skillet, cover with a lid, and cook until the cheese is fully melted and bubbly.
- Preheat the oven to 375°F (190°C). Place the tuna melts on a baking sheet and bake for 8–12 minutes, or until the cheese is melted and lightly golden.
- Air fry at 350°F (175°C) for 5–7 minutes, checking frequently to avoid over-browning.
- Remove from heat and let rest for 1–2 minutes. Garnish with parsley or green onions if desired.
Notes
Nutritional Facts and Total Calories (Approximate, per serving)
- Calories: 380–420 kcal
- Protein: 28–32g
- Fat: 30–33g
- Net Carbs: 3–5g
- Fiber: 1–2g
Keto Tuna Melt (Low Carb)
Ingredient Notes
Canned Tuna
Tuna is the star of this dish. Use high-quality canned tuna for the best flavor and texture. Tuna packed in water is lighter, while tuna in oil is richer and more filling—both are keto-friendly. Be sure to drain the tuna thoroughly to avoid a watery mixture.
Mayonnaise
Full-fat mayonnaise is essential for creaminess and keto compliance. It binds the tuna mixture and adds richness. Avoid low-fat or sweetened versions, which often contain hidden sugars.
Dijon Mustard
Dijon adds a subtle tang and depth without overpowering the tuna. A little goes a long way, enhancing the savory notes of the dish.
Celery
Celery provides crunch and freshness, balancing the creamy tuna mixture. It’s naturally low in carbs and adds texture without affecting ketosis.
Red Onion (Optional)
Used sparingly, red onion adds a mild sharpness and aroma. Because onions contain carbs, keep the quantity small or omit entirely if you prefer ultra-low carb.
Lemon Juice
A splash of lemon juice brightens the flavors and prevents the tuna mixture from tasting heavy. Fresh lemon juice is best.
Garlic Powder & Onion Powder
These seasonings add depth and savory warmth without extra carbs. They’re more keto-friendly than fresh garlic or onion in larger quantities.
Salt & Black Pepper
Essential for seasoning. Adjust carefully since canned tuna and cheese already contain salt.
Paprika (Optional)
Adds mild smokiness and color. Smoked paprika works especially well in tuna melts.
Cheddar Cheese
Cheddar is the classic choice for tuna melts. It melts well and adds sharp, bold flavor. Medium or sharp cheddar works best.
Mozzarella Cheese (Optional)
Mozzarella creates that irresistible cheese pull and soft melt. It can be mixed with cheddar or used alone.
Butter or Olive Oil
Used for greasing the pan or adding richness during cooking. Butter adds flavor, while olive oil keeps it lighter.
Keto Bread / Chaffle / Portobello / Lettuce
These replace traditional bread. Keto bread gives the most classic experience, while lettuce wraps or mushrooms are great for strict keto.
Fresh Herbs (Optional)
Parsley or green onions add freshness, color, and a mild bite to finish the dish.
Serving Instructions
Serve the Keto Tuna Melt immediately while the cheese is hot and melty. Pair it with a simple green salad, cucumber slices, or keto coleslaw for a complete meal. For extra indulgence, drizzle with keto ranch or sprinkle chili flakes on top.
Tips
- Drain tuna very well to prevent sogginess
- Use full-fat mayo for best texture
- Toast keto bread slightly for stability
- Cook on low heat to avoid burning the cheese.
- Mix cheeses for better melt and flavor
- Add chopped pickles for a classic tuna salad twist
Storage Information
- Refrigerator: Tuna mixture can be stored separately in an airtight container for up to 3 days
- Assembled Tuna Melt: Best eaten fresh
- Reheating: Reheat gently in a skillet or oven until warmed through
FAQs
1. Can I make this dairy-free?
Yes, use dairy-free keto cheese alternatives and mayo, though texture may vary.
2. Is canned tuna safe for keto?
Absolutely. Tuna is high in protein, low in carbs, and keto-friendly.
3. Can I use canned salmon instead?
Yes, canned salmon works beautifully and adds healthy fats.
4. What’s the best cheese for tuna melt?
Cheddar is classic, but mozzarella, provolone, or Swiss also work well.
5. Can I meal prep this recipe?
Prep the tuna mixture ahead of time, but assemble and cook fresh for best results.
6. Can I eat this cold?
Yes, the tuna mixture alone is great cold, but the “melt” is best enjoyed hot.
