Of the many eventful holidays that fall in April, none is more delicious than April 12th, a.k.a. National Grilled Cheese Day. Yes, like so many culinary delights before it, the ooey-gooey sandwiches you grew up craving have their very own day of celebration. Even better, it happens to fall in the middle of Grilled Cheese Month. Which is why we’ve enlisted the expertise of Spencer Rubin, founder and CEO of Melt Shop, a New York City-based mini empire of grilled cheese eateries, to share his secrets on making the perfect grilled cheese sandwich. (For the record, Rubin gives his mom full credit for his own grilled cheese-making skills.)

1. Golden brown and crunchy is key.

“The perfect grilled cheese is golden brown, crunchy to the touch, and has a little bit of cheese that is nearly burnt on the side because it spilled out over the edges from cooking directly on the skillet,” Rubin says. “The cheese pulls away from you after your first, second, and third bite. It’s savory, salty, and I always like a little bit of acid from a tomato to cut through the richness of the cheese.”

2. Butter isn't your only base option.

But it’s probably your best option. “I like salted butter, but people talk about using mayo and margarine all the time,” Rubin says of what to put in your pan. “Salted butter drives the best results, if you ask me.”

3. Don't skimp on the bread.

"Quality bread is key," Rubin says. “Too soft and it doesn’t develop the right crust; too hard and it's like eating a crouton. Ideally you want day-old sourdough. Sourdough is key because the air pockets that develop while proofing help add to the texture. You want day-old bread because it has firmed up a bit, giving it a better crunch after toasting."

4. All cheese is delicious cheese.

“Obviously good cheese is the key to a great grilled cheese,” Rubin says. “But the best thing about grilled cheese is you can never really go wrong. Whether it’s a 5-year aged cheddar, cave-aged Gruyere, or Kraft singles, they're all delicious in their own ways.” As for which cheeses melt best? Rubin says that semi-soft varieties like Muenster and Havarti are the way to go.

5. Flavor your butter for an instant upgrade.

You don’t have to break out the fine china to fancy up your sandwich. Let the butter and/or bread do all work. If you want to take your sandwich to a more sophisticated culinary level, Rubin recommends using “truffle butter, herb butter, or garlic bread with garlic and Parmigiano.”

6. Salty and sweet is a great combination.

Tomatoes and bacon are tried and true add-ons. For an unexpected combination, Rubin recommends throwing in some jams and sweets. “I always love salty and sweet combinations,” he says, citing his favorite sandwich on the menu, the Maple Bacon (maple-glazed bacon, New York cheddar, and sharp brick spread on country white bread), as a perfect example. "The combination is insane.”

7. Sides aren't required, but they make it a meal.

Though for some diners a grilled cheese sandwich is an entire meal in itself, there’s no reason not to indulge in a side dish. Melt Shop is well known for its menu of tater tots, but lighter sides work, too. “I like a nice side salad with my grilled cheese,” Rubin says. “It’s nice to get a little green in your meal and a good vinaigrette always helps brighten things up."

This story was updated for 2019.