You may have heard this trick before—or it might sound a little unconventional. Either way, consider this your nudge to try it. Once you do, there’s a good chance butter won’t make its way back into your pan.
Mayonnaise spreads effortlessly on the bread (no softening required) and browns beautifully, giving you that evenly crisp, edge-to-edge crunch every time.
As someone who has made more grilled cheese sandwiches than I can count, this is one of those small shifts that delivers big results.
Why it works so well
Mayo is made from oil and eggs, which means it’s primed for browning. When it hits a hot pan, it creates an even, consistent crust—without the patchiness you sometimes get from spreading butter or melting it in the pan (the same goes for oil).
It also spreads easily edge-to-edge without tearing the bread, so you get full coverage—and full crunch—in every bite.
And no, it won’t make your sandwich taste like mayo. Once it cooks, the flavour mellows and disappears into that classic grilled cheese profile.
What to read next
How to do it
- Spread a thin, even layer of mayo on the outside of each slice of bread.
- Build your sandwich as usual with your favourite cheese(s).
- Cook in a pan over medium heat until golden and crisp, flipping once.
That’s it. Same process, better payoff.
A few tips for the best grilled cheese
Keep the heat at medium
Too hot, and the bread browns before the cheese melts. You’re looking for steady, even heat.
Use a light hand
A thin layer of mayo is all you need—too much can tip into greasy territory.
Press gently (or not at all)
A little pressure with a spatula helps the bread come in contact with the skillet, but don’t squash it. Let the combination of mayo and heat create that golden brown crust.
Choose sturdy bread
Sourdough, rye or country gives you the best balance of crisp exterior and soft interior.
Want to take it further?
Once you’ve nailed the crust, have some fun with the flavour:
- Add a swipe of Dijon on the inside of the bread for a bright pop.
- Layer in thinly sliced jalapeño, Calabrian chile, gochujang, or hot sauce for heat.
- Go bold and funky with kimchi, olive tapenade, or a crumble of blue cheese.
- Use a mix of cheeses for better melting and deeper flavour (a little Gruyère goes a long way).
The takeaway
Grilled cheese doesn’t need reinventing—but it does reward a smart upgrade.
Swap butter for mayo, and you’ll get a crispier, more evenly golden crust every time—with zero extra effort. Simple. Reliable. And surprisingly hard to beat.
Kate Merker (she/her) is the Chief Food Director of the Hearst Lifestyle Group, overseeing the team that produces food content for several Hearst titles, including Good Housekeeping, Women’s Health, Prevention, Woman’s Day and Country Living. She has clocked nearly 20 years of experience in food media and before that, worked at some of New York City’s finest restaurants.
Mel is the Senior Food & Drink Writer for Good Housekeeping UK, covering all the delicious new product launches that come her way, writing about food and drink topics, and curating gift guides for the best foodie products to buy. Alongside that, she can be found developing and creating cocktails for GH and holds her WSET Level 2 in Wine and Spirits. She was part of the Good Housekeeping Institute food testing team for over four years before moving over to the digital side, so knows a thing or two about great food products. You'll find her scouring the supermarket shelves in her spare time for new and exciting ingredients to experiment with in her kitchen.
