Tuna and sweetcorn, with a generous spoon of mayonnaise, one of the most popular sandwich fillings in the UK, and with good reason – it’s delicious! If you buy those little pots of deli filling from a supermarket, you might be surprised to know that you can make it in moments for half the price.

What do I need to make a tuna and sweetcorn sandwich?

• some lovely thick sliced bread
• a tin of tuna, well drained
• sweetcorn. I tend to use tinned for ease, well drained, but frozen is just as good, it will need cooking first
• mayonnaise, expensive or own brand, doesn’t seem to matter much

How do I make a deli tuna and sweetcorn filling?

• open the tin of tuna and drain well. I usually tip it into a sieve over the sink and give it a little shake until it stops dripping
• tip the tuna into a mixing bowl
• open the tin of sweetcorn, or cook the frozen sweetcorn.
• add the sweetcorn to the mixing bowl
• add the mayonnaise to the mixing bowl
• give everything a thorough mix
• that’s it, store, covered, in the fridge until needed.It will keep in the fridge for 3-4 days

 

• once ready to eat, spread a quarter of the mix onto a slice of thick cut bread, top with the other slice, cut in half and eat, or wrap ready for packed lunch time
• there’s no need for butter or anything else

This is a very easy recipe to upsize or downsize, simply use equal quantities of all three ingredients.

How to store tuna and sweetcorn mix

In the fridge in an airtight container, this mix will sit quite happily for 3 days.

This filling will not freeze well, so is not recommended

 

What other ingredients could be used in a tuna mayonnaise sweetcorn sandwich

• When pricing this deli sandwich mix, I noticed that Aldi had many delicious mayonnaise options – roasted garlic, peri peri or lemon and black pepper. Any of these would make a delicious variation.
• add a dollop of Dijon mustard
• You could add finely chopped vegetables
  • very finely sliced celery
  • grated carrot
  • fine chopped black olives
  • layer in a few green leaves of some sort
• change up the bread to sourdough, granary, floury baps or anything else you fancy
• add some sliced gherkins
• swap the mayonnaise for soft cheese

How much does this filling cost?

priced at Aldi.com in May 2025

• Tin tuna in brine 65p 120g, 102g drained
• tin sweetcorn, 100g of a 285g / 65p tin used, 23p
• mayonnaise, Bramwells 500ml, 95p, 100ml used 27p
• this makes 4 sandwiches, so 8 slices of bread. Toastie bread, 75p, 20p for 6 slices
• Total cost of filling, £1.15 for 300g. The equivalent in Aldi at the time of writing is £2.61 for 385g, so this is less than half the price
• Plus 27p for bread
• Cost per sandwich 35p
• Cost per sandwich using purchased pot of deli filling – 57p

What else can I use this for

You might not want three tuna sweetcorn sandwiches, so what else can you use this mixture for?

• stir it through cooked pasta and enjoy hot or cold
• top a jacket potato with it
• enjoy with a platter of crudités

 

Other sandwiches you might like

Christmas Coronation Sandwich

Egg, Lentil, Raisin, Puy & Curry Sandwich

Olive, Soft Cheese and Cucumber Sandwich