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Traditional method

Maize tortillas

Tortillas de maíz · tortilla de maíz · corn tortilla · maize tortilla

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Fresh nixtamalized maize is ground into masa, pressed into thin rounds and cooked on a comal. This Mexican home formula uses food-grade cal viva and makes about 20 tortillas.

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Plain maize tortillas made from nixtamalized masa, stacked with one folded to show their soft flexible structure; editorial image, not a photograph of a particular batch.

A source batch with three separate stages

Maize tortillas begin with masa, a dough made from maize treated through nixtamalization. This entry follows Fundación Tortilla’s 2020 home formula: one kilogram of maize, ten grams of food-grade cal viva and three litres of water for the nixtamal stage, followed by grinding and pressing. The batch yields about twenty tortillas. It is a basic home method, not an exclusive formula; maize and household practice vary by region and tradition.

Nixtamalization is an alkaline grain treatment. It is not fermentation, and the masa does not need a live starter or a leavening agent. This recipe therefore describes an unleavened bread. The Mexican standard cited below recognizes both food-grade calcium oxide and calcium hydroxide for nixtamalization. Fundación Tortilla’s ingredient list specifically says cal viva, commonly translated as quicklime, so this version preserves that source wording rather than substituting the Smithsonian handout’s separately measured calcium hydroxide batch.

The Smithsonian National Museum of American History handout is useful corroboration for a separate nixtamal process, but it gives a different 500-gram maize and 5-gram calcium hydroxide formula and ends at masa. It does not describe pressing or comal cooking. Those missing stages are supplied here from Fundación Tortilla’s independent complete home batch; the ingredient quantities and process steps are not combined.

The article places tortillas within Mexican cooking and names variation among homes and regions. That supports a country-level documented-preparation association, not a precise birthplace. It also provides no dated first attestation. The recipe is a contemporary record of a traditional preparation, but its 2020 publication date is not the age of the food.

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Clean grain and prepare the lime water

Sort the dried maize and remove stones or debris. Rinse it well and drain. The formula uses one kilogram of maize kernels. It does not identify a maize variety, kernel moisture, or size; those differences can affect the time needed to loosen the skins.

Warm the three litres of water in a large pot. In a separate cup of cold water, slowly dissolve ten grams of food-grade cal viva, then mix this lime water into the warm pot. The mixture releases heat while the lime dissolves. Avoid breathing dust, avoid splashes, protect eyes and skin, and check the product label. Calcium oxide reacts with water; the Mexican standard also permits food-grade calcium hydroxide, but this formula names cal viva. Do not substitute construction or masonry lime.

Add the grain when the lime water reaches a boil, then keep the maize hot without allowing it to boil. Boiling the kernels can produce sticky masa. Adjust the flame or add cold water to manage the heat. No numerical temperature is given.

Cook for 25 to 40 minutes, depending on the maize. Rub a few kernels to check whether their skins loosen readily. The centre remains somewhat firm because the grain continues to soften while resting. This is a cooking cue, not a food-safety test.

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Rest, rinse and grind into masa

Remove the pot from the heat and cover it while the maize rests in its cooking liquid for six to eight hours at room temperature. This recipe gives no microbial safety validation or measured pH endpoint for the rest. It does not claim shelf stability.

After the rest, rinse the cooked maize with clean water to remove nejayote, the lime-containing cooking liquid. Retain the loosened maize skins for fibre and texture. Drain the grain before grinding.

Grind the nixtamal in a hand mill or on a metate. Add the listed cup of water gradually to moisten the grain and develop a firm but hydrated masa. Grind again as needed until no large grain pieces remain, then knead briefly to make the dough even. Too much water makes masa too wet to press well. The formula gives no fixed total water quantity beyond the cup and small additions as needed.

This method omits salt to keep the masa neutral. Salt is therefore absent from this batch, rather than treated as a missing amount. Other formulas may season the dough, but they are separate preparations.

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Press and cook the tortillas

Keep the masa covered while you work. Prepare a clean cloth-lined tortilla basket, and line both sides of the press with thin plastic so the dough releases. Heat a comal over medium flame; no surface temperature is given. Pinch off a portion of masa and roll it into a ball, called a testal in the Spanish instructions. Place it between the plastic and press it to the desired thickness.

Open the press and lift the plastic with the tortilla. Support the dough on one hand while peeling away the other sheet. Set it on the hot comal. Turn it when the edge changes colour, cook the other side until the tortilla releases easily, then turn it a third time and press lightly with the fingers to encourage it to puff. No tortilla weight, diameter, cooking time or numeric griddle endpoint is given.

The batch yields about twenty pieces. It gives no scaling method or standard size. Keep to this batch when reproducing it; changing the maize, grinding moisture, tortilla thickness and comal heat would create an adaptation without a tested result for this formula.

Place the cooked tortillas in the lined basket to keep them warm and serve them hot. If not serving immediately, cool them spread out and refrigerate them in a plastic bag to limit drying. No storage duration is stated.

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Safety and evidence limits

Only use lime clearly sold as food-grade and intended for nixtamalization. The recipe calls its material cal viva; official Mexican requirements distinguish food-grade calcium oxide from food-grade calcium hydroxide. Do not infer the material’s chemical form from the word “lime” on an unrelated building or garden product.

Cal viva (quicklime) reacts with water and releases heat. International safety guidance warns that airborne dust can be harmful and that the material can damage eyes, skin and the respiratory tract. Add the measured product slowly to water, avoid breathing dust and prevent splashes or contact with skin and eyes. Follow the product label. The Mexican standard distinguishes food-grade calcium oxide from calcium hydroxide, so do not assume that the formula's cal viva is the same material as the Smithsonian recipe's calcium hydroxide.

Use care with the pot, hot lime liquor and comal. Keep raw ingredients and lime liquor separate from ready-to-eat foods until the prescribed cooking and rinsing stages are complete. The six-to-eight-hour room-temperature rest and refrigeration instruction are stated by the recipe, but no validated safety limit or finished-tortilla shelf life is provided. The comal instruction is qualitative, with no numeric cooking temperature.

The kernel-skin and tortilla-release cues describe texture and handling. They do not prove that a process is microbiologically safe. Nixtamalization changes the grain and prepares masa; it does not make the finished product shelf stable. Serve fresh or follow a separately validated storage procedure.

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History

Fundación Tortilla describes maize tortillas as central to Mexican cooking and says there is no exclusive formula because maize and methods vary among households and regions. The 2020 home recipe documents one batch and one workflow. These sources do not date the first tortilla or identify a single place of origin. The Smithsonian’s separate handout documents nixtamal and masa preparation but stops before tortilla pressing and griddle cooking, so its batch is not merged here.

Ingredients

Yield 20 tortillas · Scaling: source batch only

Dried maize kernelsClean and rinse.
1 kg
Food-grade cal viva (quicklime)Add to a cup of cold water to dissolve, as directed by the source. Its precise amount of dissolving water is not stated.
10 g
Water for nixtamalizationThe source also adds enough during cooking to keep the kernels covered; extra quantity is not stated.
3 L
Water for grinding masaAdd gradually; the source also permits small additions as needed, without quantifying them.
237 mL1 cup as recorded
Rinse waterClean water for rinsing maize before cooking and rinsing nixtamal after its rest.
Amount not stated
As needed; amount not stated

Method

Risks and precautions · Standard risk
Food-grade quicklime dust and fresh lime water

The source calls for cal viva, which the Mexican standard identifies as calcium oxide as one permitted lime form. Calcium oxide reacts with water, releases heat and can damage eyes, skin and the respiratory tract.

Hazard source
Hot pot, lime liquor and comal

The recipe handles hot water and a heated cooking surface; burns are possible during simmering, draining and tortilla cooking.

Hazard source

Use only lime sold for food processing and labelled for nixtamalization. Slowly add the measured lime to water, avoid breathing airborne dust, and prevent eye and skin contact; the recipe source notes heat release during mixing.

Control source

Use care around the hot pot and comal, and keep the lime liquor separate from food after the nixtamal rest; rinse the grain as directed.

Control source

The Spanish source specifies food-grade cal viva (quicklime); do not silently replace it with construction lime or assume it is the same purchased material as calcium hydroxide. The Mexican standard permits food-grade calcium oxide or calcium hydroxide, but this particular formula names cal viva.

The source directs a 6–8-hour covered rest at room temperature and later refrigeration of cooked tortillas, but gives no validated safety endpoint for the rest and no finished-tortilla storage duration. Do not treat its timings as independently validated limits.

Medium comal heat, kernel-skin release and tortilla puffing are preparation cues in the source, not measured food-safety endpoints.

  1. Sort the dried maize to remove stones and other debris. Rinse it well and drain.
  2. Heat 3 L water in a large pot. In a separate cup of cold water, slowly dissolve food-grade cal viva to make an alkaline cooking liquor. Avoid dust and splashes; adding lime to water releases heat. Add the lime water to the warm pot water.
  3. When the alkaline water reaches a boil, add the rinsed maize. Keep the pot hot without letting the grain boil; boiling can make the masa sticky. Adjust the flame or add cold water as needed. The method gives no numeric cooking temperature.
  4. Cook for 25–40 minutes, depending on the maize. Rub a few kernels to check whether their skins loosen readily. Their centres should remain slightly firm because they continue softening during the rest.
  5. Take the pot off the heat and leave the maize covered in its cooking liquid for 6–8 hours at room temperature. This method gives no validated safety limit for the hold.
  6. Rinse the rested maize with clean water to remove the lime liquor, called nejayote. Retain the loosened skins for their fibre and texture.
  7. Grind the nixtamal in a hand mill or on a metate. Add the measured cup of water gradually, with small additions only as needed, until the masa is firm but moist. Grind again as needed until smooth, then knead briefly to even it out. Do not add all the water automatically: a very wet masa will not form tortillas well.
  8. Keep the masa covered while working. Warm a comal over medium heat. Prepare a clean cloth-lined tortilla basket and place a thin plastic sheet over both faces of a tortilla press.
  9. Pinch off a portion of masa and roll it into a ball. Put it between the plastic sheets in the press and flatten it to the thickness desired. Peel the tortilla away gently, using a hand to support it.
  10. Cook the tortilla on the comal. Turn it when the edge changes colour, cook the other side until it releases easily, then turn it a third time and press lightly with the fingers to encourage it to puff. No numeric comal temperature or cooking time is given.
  11. Move cooked tortillas into the lined basket to keep warm. Serve hot. For later use, cool them spread out, then refrigerate them in a plastic bag. No storage duration is given.

Conditions

Yield20 tortillas
Active time85 min

Places

Mexico

Documented preparation · Country evidence

Fundación Tortilla presents this as a Mexican home method and says recipes vary by household, region and maize; this country association does not identify a birthplace or a single national formula.

See Mexicoon the mapLocation source 1 →

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