According to glorious food blogger and magical life-changer Tristan Lutze, the secret to a perfect toastie is, in fact, mayonnaise.
"So, if you use mayo on the outside of your toasted cheese sandwiches instead of butter, you’ll get a crispier, meltier, more delicious result," he revealed in a new post, to shocked cheese toastie aficionados around the globe.
According to Tristan, the bread browns more evenly, but burns less quickly when you use mayonnaise instead of butter. What?! He also pointed out that it spreads evenly on a range of breads, and toasts any loaf to 'crispy' perfection.
Excuse us, but we're off home to give this 'superior' recipe a good old fashioned try.