The Secret to Puesto's Signature Crispy Melted Cheese Tacos

AUGUST 11, 2026

Puesto's crispy melted cheese, often called a costra, is a layer of cheese crisped directly on the plancha until it turns golden and crisp, then wrapped the taco's filling. It's the base layer under nearly half of the tacos on Puesto's menu, from the award-winning Filet Mignon Taco to Chicken Al Pastor.

What Exactly Is Puesto's Crispy Melted Cheese?

At Puesto, every crispy melted cheese taco starts the same way: a generous handful of cheese is scattered onto a hot grill, where it melts, spreads, and crisps into a thin, golden layer. Rather than serving that cheese on its own, the kitchen tops it with a protein or guisado, then rolls the whole thing up — cheese on the outside, filling tucked inside. It is then placed on a warm, hand-pressed blue corn tortilla before adding the taco's salsas and other toppings. The result is a taco with two textures built into the shell itself; the soft, slightly nutty corn tortilla on one side, and a crackly, savory cheese layer on the other.

This method has a name in Mexican cooking: costra, which translates roughly to "crust" or "shell." It's a technique long used at grills and taquerias, where cheese is browned on a flat-top until it holds together as a crisp sheet, then used to encase a filling.

Which Tacos Feature the Crispy Melted Cheese?

The crispy cheese layer shows up across most of Puesto's signature taco lineup. A few standouts:

• Filet Mignon Taco — crispy melted cheese, marinated filet mignon, avocado, and a spicy pistachio serrano salsa served on the side.
• Chicken Al Pastor Taco — crispy melted cheese, chicken in a hibiscus and chipotle tinga, avocado, and piña habanero pico.
• Short Rib Quesabirria Taco — crispy melted cheese, Jalisco salsa, radish, guacamole
• Mushroom Taco — crispy melted cheese,  mushrooms, pickled onions, stone fruit serrano salsa

Why the Technique Works

Crisping cheese on a hot surface relies on straightforward food science: as cheese melts, its moisture cooks off and its proteins and fats brown, creating the same kind of savory, crackly texture found in a well-made frico or the edges of a cheese quesadilla left a little too long on the pan, except here, it's done deliberately. Wrapping that crisped layer around a warm tortilla while it's still pliable lets the cheese bond to the corn instead of shattering, giving the taco a shell with structure and crunch before any filling is added.

Where to Try It

Puesto operates locations across San Diego, Orange County, and the Bay Area in California, and the crispy melted cheese method has been part of its taco program since early on, drawing attention at food events for its taco shells made of crispy melted cheese.

Frequently Asked Questions

Q: What is Puesto's crispy melted cheese?

A: It's Puesto's signature costra preparation — cheese crisped directly on the grill, then wrapped around a blue corn tortilla with the taco's filling.

Q: Is it the same as queso fundido?

A: Related but different. Queso fundido is melted in a dish and scooped with tortillas or chips; Puesto's costra-style cheese is grilled into a crisp sheet that becomes the taco shell itself.

Q: Which tacos include it?

A: Most of the core menu, including the Filet Mignon Taco, Chicken Al Pastor Taco, Short Rib Quesabirria, Mushroom Taco, and more.

Q: Where can I find Puesto?

A: Puesto has restaurant locations in San Diego, Orange County, and the Bay Area, California. Their new location in Nashville, Tenessee will open Fall of 2026.

Q: Where can I make a reservation at Puesto?

A: You can make a reservation here for any Puesto location.