Better Than Butter: This Secret Ingredient Takes Your Grilled Cheese to the Next Level

Hot, golden, and melty… The grilled cheese checks all the boxes of comforting snack food. It’s a quick delight that lets you use up the last bits in the fridge. Essentially, it involves sandwiching ham and cheese between two slices of sandwich bread (maybe adding a bit of béchamel sauce for those who like it extra indulgent), and then cooking it in the oven or on the stove. It’s fundamentally simple.

But there’s a huge difference between a barely browned and a perfectly toasted sandwich. Ideally, you want a perfect contrast between crispy bread and a gooey center. However, it often falls short: the bread may cook unevenly, become too soft, or soak up too much fat, making it heavy. It’s a far cry from the sandwiches served in bistros.

To properly crisp the sandwich bread, many of us have the same instinct, which is to butter the slices before cooking. This is supposed to ensure a good golden color… but it doesn’t always work. Butter has its drawbacks: it’s hard to spread straight from the fridge, and it tends to burn easily if you cook your grilled cheese over too high heat.

This particular issue has led some culinary enthusiasts to rethink their approach, including Leah. Instead of reaching for the butter dish, she opts for a completely unexpected ingredient: mayonnaise! Spread in a thin layer on the outside of the bread, it provides a much more even coloration. Since oil has a higher smoke point than butter, it’s less likely to burn before the cheese melts. Moreover, the egg yolks in the mayonnaise aid in the Maillard reaction, which is responsible for the caramelization of food. Thus, the sandwich turns out exceptionally crispy (and beautifully golden). But that’s not all. While butter mainly adds fat, mayonnaise introduces a slight tanginess that balances the richness of the melted cheese, creating a more complex flavor profile.

However, be cautious, this trick does not work with low-fat mayonnaise. Due to their higher water content, they tend to soften and sog the bread.