Oaxaca and Chihuahua cheeses are the foundation of good melted cheese tacos.

Tacos de queso fundido combine soft tortillas with ingredients like Mexican chorizo ​​and poblano peppers. What makes the difference is the cheese. It's not about adding Velveeta or store-bought nacho cheese sauce, but about preparing the melt with cheeses that provide an elastic texture and their own distinct flavor. This results in a more satisfying experience than the runnier chile con queso that's popular in Texas.

Oaxaca and Chihuahua cheeses are the kings of melted cheese. Oaxaca has an earthy, buttery flavor, a stretchy texture similar to low-moisture mozzarella, and melts easily, making it ideal for filling tacos or enchiladas. Chihuahua, comparable to a mild cheddar, adds a tangy note. Both are delicious on their own and pair well with each other without overpowering the flavor of the other ingredients.

Other cheeses work too. Quesadilla cheese adds extra creaminess and flavor, and if you can't find it, Monterey Jack cheese works just fine. Chef Pati Jinich makes her queso fundido with asadero cheese, caramelized onions, and diced tomatoes. She notes that flour tortillas are the most popular accompaniment, though corn tortillas are a good option too.

It's important to distinguish between queso fundido and classic cheese sauce. The latter is a smooth sauce poured over dishes or used as a dip for tortilla chips. Queso fundido is made by melting cheeses like Chihuahua, Oaxaca, Asadero, Mennonite, or Manchego with other ingredients. When freshly melted, it has a stringy texture ideal for spreading on a warm tortilla.

Melted cheese is served hot, straight from the pan or pot, so it bubbles and stays creamy longer. That sizzling presentation isn't achieved with traditional cheese. In short, Oaxaca and Chihuahua cheeses offer the ideal balance between mild flavor and elastic texture, and Velveeta could never match it.