The Secret To A Grilled Cheese With A Perfectly Crisp Outside And Gooey Inside

The perfect diner-style grilled cheese has to be both crisp and gooey. More specifically, we want that deep crisp on the outside, the kind that crunches when your teeth sink into it, and gloriously gooey cheese that spills out. Achieving exactly that combination of textures at home is way more simple than you might think. By adding a tiny splash of water to the pan you're grilling on, then covering it with a lid, you can create enough steam to help soften and melt the cheese. All the while, the hot pan below continues to crisp up the bread.

Start by cooking the sandwich in a little melted butter or oil over medium-low heat, and once the underside is golden, flip it and add just 1 teaspoon of water to an empty part of the pan. You don't want to throw the water directly onto the bread and make it soggy; instead, just create steam around the sandwich to melt the cheese. Once the water starts steaming, cover the pan with a lid and let the trapped steam work for about 60 seconds. The lid is an important component because it traps the steam and keeps it around the sandwich, but then once the lid comes off, all that remaining moisture evaporates and the bread can continue to crisp.

The reason why this hack works so well comes down to a few kitchen science facts. In order to make the crispiest grilled cheese, the bread has to undergo the Maillard reaction — a series of chemical changes that create savory flavors and a golden crust. The browning needs to occur on a relatively dry and hot surface. The cheese also needs heat to melt, though the direct heat from the pan can make the bread brown faster than the cheese can melt. And that's where steam comes in. It creates a warm and humid environment that encourages the cheese to soften quickly, but without affecting the bread's browning.

You can use this hack on grilled cheese sandwiches made with all kinds of cheese and bread, whether you're keeping it classic or swapping white bread for a savory alternative. And while it works great if you're melting mozzarella, Gruyère, or cheddar – particularly if you've stacked your slices generously and they need a helping hand — it also works with non-dairy cheese. A little steam can actually be really effective for vegan cheeses, which melt differently than dairy cheese. Regardless of ingredients, using both steam and direct heat is what will get you the elusive crispy and gooey textures you are dreaming of.