Corn Tortillas (Tortillas de Maíz)

Tap a step’s number to check it off as you go.

1. 1

   Whisk the masa harina and salt in a wide bowl. Pour in 600 ml of the hot water and mix with a spoon until it comes together, then knead in the bowl for 2 minutes until you have a smooth, uniform dough.

   Why: Hot water rather than cold: masa harina's starch has already been cooked once during nixtamalization, and warm water swells those gelatinized granules quickly and evenly, so the dough becomes cohesive in two minutes rather than ten. Cold water gives a gritty dough that never quite comes together.

2. 2

   Cover the bowl with a damp cloth and rest for 30 minutes.

   Why: The flour is ground finely but not instantly. Thirty minutes lets water reach the centre of every particle, and fully hydrated masa is what stops the pressed edges cracking. This rest costs nothing and fixes the most common failure.

3. 3

   Test the hydration before you commit. Roll one 35 g ball and press it flat. If the edges crack, the dough is dry — work in water a tablespoon at a time. If it smears on the plastic and won't peel off cleanly, it is wet — knead in a spoonful more masa harina. Correct masa feels like fresh play-dough: soft, faintly tacky, and it takes a thumbprint without splitting.

   Why: Hydration is effectively the only variable in this recipe, and no written quantity can be right for every flour. One test tortilla tells you more than any measurement, and adjusting now is far easier than salvaging eighteen cracked ones later.

4. 4

   Set a comal, cast-iron skillet or heavy steel pan over medium-high heat and leave it there for 5 minutes, until a drop of water skitters and evaporates on contact — around 200°C / 400°F. Use no oil at all.

   Why: A tortilla is baked, not fried. The dry, genuinely hot surface flash-sets the outside and turns the water inside the masa to steam fast enough to inflate the tortilla. Oil insulates the surface and a merely warm pan dries the dough out instead, which is why tortillas from a lukewarm pan come out leathery.

5. 5

   Divide the dough into 35 g balls — about 18 — rolling each smooth and keeping them under the damp cloth as you go. Lay one sheet of plastic on the open press, a ball slightly off-centre toward the hinge, the second sheet on top, and press firmly once, then rotate the disc 180° and press again to about 2 mm thick and 13 cm across.

   Why: Balls dry out with alarming speed, hence the cloth. The half-turn between presses evens out the wedge that every press makes — plates are never perfectly parallel, and a tortilla thicker on one side cooks unevenly and will not puff.

6. 6

   Peel the top plastic away, lift the tortilla on your palm or fingertips, and lay it flat onto the hot surface — it should hiss. Cook 15–20 seconds only, until the surface loses its wet shine and the edge lifts, then flip.

   Why: This first contact is deliberately brief. All it does is set a thin skin on one face; leave it longer and that face dries hard, and a tortilla with two hard faces can never inflate. This is the step people rush past, and the whole three-turn sequence depends on it.

7. 7

   Cook 45–60 seconds on the second side, until pale brown freckles appear and the tortilla looks dry at the edges. Then flip it back onto the first side for a final 20–30 seconds — press the middle gently with a fingertip or a folded cloth and it should balloon.

   Why: Three turns, in that rhythm, for a reason: the long second side drives enough water into steam, and returning the already-set first side to the heat traps that steam under a sealed skin so it inflates the tortilla and splits it into two paper-thin leaves. The puff is not showmanship — it is the visible proof that your hydration and your heat are both right, and the split is what lets a tortilla be opened and stuffed.

8. 8

   Move each finished tortilla straight into a cloth-lined basket, folding the cloth over the stack, and carry on. Let them sit 5 minutes before serving.

   Why: A tortilla leaves the comal stiff. Stacked and covered, they steam one another: the residual moisture redistributes through the starch and they turn soft and foldable. This is also why a tortillería sells them wrapped in paper inside a cloth — the wrapping is part of the recipe.

9. 9

   To make masa from whole corn instead, start a day ahead. Rinse the corn, discard floaters, and bring it to a boil with the 3 litres of water and the cal. Simmer 15–20 minutes, until a kernel's skin slips when rubbed between your fingers but the centre is still firm and chalky, then take it off the heat, cover, and steep 8–12 hours overnight.

   Why: The alkali does three things no other treatment does: it dissolves the pericarp so the kernel can hydrate and grind, it frees the niacin that is chemically bound in raw maize — the reason maize-dependent peoples in Mesoamerica never suffered pellagra while nineteenth-century Europe and the American South did — and it leaves behind calcium the body can use. It also creates the aroma everyone recognises as tortilla. Undercook, and the corn won't grind; overcook, and you get mush and a soapy taste.

10. 10

    Drain the nixtamal, rub it under running water between your palms until the loosened skins wash away and the water runs clear, then grind it wet — on a metate, through a hand mill, or in a food processor in batches with a splash of water — until it is a smooth, slightly tacky masa with no gritty fragments. Knead briefly, then press and cook exactly as above.

    Why: Rinsing off the skins and the surplus lime is what keeps the masa from tasting bitter or chalky. Wet grinding matters too: the aim is to shear the softened, still-damp grain into a paste that binds on its own, which is precisely the job the metate has done in Mesoamerican kitchens for three thousand years. Fresh masa should be cooked the same day — it sours by the next.