The comal — a flat, unglazed clay or cast-iron griddle — is the most important cooking surface in Mexican cuisine. It provides intense dry heat for charring chiles, tomatoes, onions, garlic, and tomatillos, toasting tortillas, and cooking tlayudas. The charring isn't incidental — it's a deliberate technique that creates smoky, sweet, bitter-complex flavour compounds through controlled pyrolysis that no oven or broiler can replicate.
The comal is heated dry with no oil. Ingredients are placed directly on the hot surface and left to blacken on one side before turning. Tomatoes and tomatillos blister and collapse, releasing juices that caramelize on the surface. Chiles puff, blister, and darken. Onion and garlic char on the cut surface. The charred bits are essential — they go into the salsa or mole. For tortillas: 30 seconds first side, flip, 60 seconds second side, flip back — the tortilla should puff with steam. That puff means proper masa hydration and technique.
A well-seasoned cast iron skillet works if you don't have a comal. For salsa: char tomatoes, chiles, onion, and garlic on the comal, then crush together in the molcajete. The combination of char and stone-ground texture is what makes Mexican salsa taste fundamentally different from anything made in a blender with raw ingredients.
Using oil on the comal. Not getting it hot enough — you need real charring, not gentle browning. Turning too often. Removing charred skin from tomatoes — the char IS the flavour. Pressing tortillas flat during cooking — let them puff naturally.