Tuna melts are a classic comfort food found in many high street cafés. But the one you make at home is almost always going to taste better, especially when you add one simple ingredient that people say makes it “the best ever”.

The secret? Chopped pickled jalapeños. The added tang and gentle heat from the jalapeños apparently takes the toasted sandwich to a whole new level, balancing the creamy filling and melted cheese. The recipe was shared by food writer Zaynab Issa on Bon Appétit, and it’s quickly become a favourite with home cooks.

Her version keeps things simple but adds plenty of flavour. Along with the tuna and mayo, it includes red onion, celery, dill, and a touch of lemon juice.

But it’s the pickled jalapeños that many say make all the difference.

“The best tuna melt ever indeed,” one person wrote. “I have it every week now.” Another added: “Tried it at home and my husband graded it 11/10! Excellent recipe!”

A third reviewer said: “Absolutely loved this tuna salad! We used pickled jalapeños because it was on hand and the flavour was great.”

Someone else commented: “Wowowow super good! Used a shallot and pickled jalapeños.”

The sandwich is toasted in a pan until the bread turns golden and crisp and the cheese fully melts. It’s best served with kettle-style crisps and a dill pickle on the side.

Here’s how to make it at home.