This Tuna Salad Sandwich is absolutely packed with flavour and couldn’t be easier to make!
A classic tuna salad sandwich can be humble, but with the right dressing and a few crunchy extras it becomes truly memorable. Below I walk you through the simple dressing, suggested mix-ins, assembly tips and the full recipe so you can make a bright, satisfying sandwich in minutes.
Tuna Salad Dressing
Every great tuna salad starts with a well-balanced dressing. Here I use a simple combination of mayonnaise, mustard and lemon to add creaminess, gentle heat and brightness. Make the dressing separately so the flavours meld and you avoid overworking the tuna, which helps the salad keep a pleasant texture.
- Mayonnaise – Use full fat whole egg mayonnaise for the best mouthfeel and flavour. Reduced-fat varieties can alter the taste and texture.
- Dijon mustard – Just a touch adds a subtle, rounded heat.
- Lemon juice – Fresh lemon brightens the mixture and complements fish beautifully. Add modestly and adjust to taste.
- Salt & black pepper – Season to taste; a few grinds of cracked black pepper lifts the whole salad.
Combine the mayo, mustard, lemon juice and seasoning in a small bowl or pot and whisk until smooth. Taste and adjust before adding to the tuna so you control the final balance of acidity and seasoning.
Tuna Salad
Best tuna to use
I recommend canned tuna in chunks rather than flakes. Chunk-style tuna holds its form better and avoids a mushy result. Choose a good-quality brand if possible and drain well—oil, spring water or brine all work fine as long as the tuna is drained before mixing.
Recommended mix-ins
- Celery – Finely diced for crunchy texture.
- Spring onion – Adds a mild onion bite; finely dice. Red onion can be used as an alternative.
- Dill pickles – Finely chopped for tang and contrast.
- Parsley – Fresh chopped parsley brings a bright herbal note (a little dill may be used sparingly).
To assemble the salad: drain the tuna into a bowl, add the chopped vegetables and herbs, pour in the dressing and fold gently until combined. Taste and adjust with more lemon, salt or pepper if needed. Stirring too vigorously will break the tuna down, so fold lightly to keep pieces intact.
Make ahead: You can prepare the salad a day or two in advance and keep it tightly covered in the fridge. It may release some liquid as it rests; stir through a spoonful of mayo before serving to refresh the texture.
Tuna Salad Sandwich
I keep the sandwich simple so the tuna shines. The core additions I like are lettuce, tomato and cucumber. Tomato and cucumber add great flavour but also moisture, so I slice them and layer them in the sandwich rather than mixing them into the tuna. Lettuce gives crunch and prevents sogginess.
Optional additions
Avocado slices are an excellent addition for creaminess. Some people like sliced hard-boiled egg in their tuna sandwich; that works if you enjoy it.
To toast or not to toast
Toast is optional. Toasting helps keep the filling secure and adds texture, but some prefer the contrast of cool tuna against untoasted bread. Choose according to taste.
Serving suggestions
- Crisps or chips: A lightly salted crisp pairs nicely with the tang of the tuna.
- Sides: Sweet potato wedges or a simple roasted vegetable salad complement the sandwich well.
How to make a Tuna Salad Sandwich (Full Recipe)
Ingredients
Tuna Salad
- 2 x 5oz / 145g cans tuna, drained
- 1/2 cup /120g mayonnaise
- 2 tbsp finely diced fresh parsley
- 1 tbsp finely diced dill pickles
- 1 rib celery, finely diced
- 1 spring/green onion, finely diced
- 1 tsp Dijon mustard
- Juice of 1/2 lemon (or to taste)
- 1/4 tsp salt and 1/4 tsp cracked black pepper (adjust to taste)
Sandwich
- 6 slices wholemeal seeded bread (or bread of choice), optionally toasted
- 3 large leaves round lettuce
- 12 slices vine-ripened tomato
- 12 slices cucumber
- Butter, as needed
Instructions
- Make the dressing: whisk together the mayonnaise, Dijon mustard, a squeeze of lemon juice (reserve a little) and salt & pepper in a small bowl.
- Combine the salad: in a mixing bowl add the drained tuna, spring onion, parsley, dill pickles and celery. Pour in the dressing and fold gently until evenly combined. Taste and adjust seasoning and acidity with more salt, pepper or lemon juice if needed.
- Prepare the bread: spread one side of each slice with butter. On three slices add a lettuce leaf, then arrange cucumber and tomato slices.
- Assemble: spoon the tuna salad onto the prepared slices, top with the remaining slices of bread, slice in half and serve.
Notes
- Capers make a good substitute for pickles. If you prefer a sweeter tang, try a little pickle relish.
- Red onion (about 1/4 cup finely diced) can replace spring onion if you like a stronger onion flavour.
- If using dill, use sparingly—dill is more assertive than parsley.
- The salad can be made 2–3 days ahead and kept refrigerated. Stir in a little extra mayo before serving if it becomes watery.
If you try this Tuna Salad Sandwich, leave a comment describing any tweaks you made or serve ideas you enjoyed.