Classic Tuna Salad
Cold deli-style tuna salad with drained canned tuna, mayonnaise, crisp celery, red onion, lemon, and Dijon, for sandwiches or scoops.
Updated: Nov 9, 2026
Why you'll like it
- Ready in about 15 min.
- Serves 4 — easy to halve or double.
- Easy level — everyday equipment only.
- No-cook / minimal cooking.
- Fits a busy weeknight.
- Storage, freezing and reheating covered below.
Classic Tuna Salad takes about 15 minutes and makes 4 servings. This is the cold deli-style salad, not a melt: drained canned tuna folded into mayonnaise with crisp celery, sharp red onion, lemon juice, and a spoon of Dijon mustard.
Helpful guides
Instructions
Turn the tuna into a fine-mesh sieve set over a bowl and press it gently with the back of a spoon until no more liquid drips out. Water-packed tuna carries a surprising amount of brine, and draining it thoroughly is what keeps the salad from turning wet and loose.
Flake the tuna with a fork into bite-size pieces, leaving some larger chunks intact. Overworking it turns the fish into a paste and the finished salad loses any texture, so stop as soon as it separates.
Whisk the mayonnaise, lemon juice, Dijon, salt, and black pepper together in a mixing bowl until smooth. Adding the acid and mustard to the dressing first spreads them evenly instead of leaving a sour pocket in one bite.
Fold in the celery and red onion, then add the tuna and fold gently until everything is combined. Taste and adjust with more lemon, salt, or pepper, since the amount of salt needed depends on the brand of tuna.
Stir in the parsley or dill, then use the salad right away or chill it for 10 minutes for the flavors to settle. Serve it between bread slices with lettuce, mounded on greens, or scooped onto crackers.
Troubleshooting — fixes, not repeats
- If the salad looks watery, the tuna was underdrained or the celery was wet; drain the tuna harder, pat the celery dry, and stir in 1 tbsp more mayonnaise to bind it.
- If it tastes bland, reach for lemon and salt before more mayonnaise; the salad goes flat when the acid is low, not when the fat is low.
- If you want a finer deli texture, chop the tuna briefly with a fork or pulse it two or three times in a food processor, keeping a few chunks for body.
- If the onion is too sharp, soak the diced red onion in cold water for 5 minutes and drain it well before folding it in.
Make it your way
- Add 2 tbsp chopped dill pickles and 1 tsp capers for a tangier, brinier salad.
- For an olive-oil version, use 2 cans of oil-packed tuna, drained, with only 1/4 cup mayonnaise and 1 tbsp olive oil.
- Stir 1 tsp curry powder into the dressing with the Dijon for a curried tuna salad, or add 1/2 cup diced apple for a sweeter, crunchier mix.
Storage & reheating
Cool leftovers within 2 hours, then refrigerate in a covered container and use within 3 to 4 days. Reheat only the portion you will eat until steaming hot throughout — poultry and reheated rice should reach 165°F (74°C).
Tuna salad does not freeze well, because the mayonnaise separates and the celery turns soft and watery on thawing.
FAQ
How long does tuna salad last in the refrigerator?
About 3 to 4 days in an airtight container, counted from the day it is mixed. Cool it within 2 hours of making it and keep it refrigerated between servings. If it smells sour or looks watery and separated after that window, throw it out.
Can I use oil-packed tuna instead of water-packed?
Yes, and it gives a richer, more substantial salad. Drain the oil well and reduce the mayonnaise to about 1/3 cup, since oil-packed tuna is already moist. Water-packed tuna is firmer and more neutral, which is why it is the standard for deli-style salad.
Why is my tuna salad watery?
Almost always because the tuna was not drained enough or the vegetables were wet. Press the tuna in a sieve until it stops dripping, pat the celery and onion dry, and mix the dressing separately so you can control how much liquid goes in.