Masa Harina in Australia: Who Sells It and What You Pay

Masa harina is the gateway to real Mexican cooking and the single most commonly botched purchase in Australia. The reason is a vocabulary collision: in this country cornflour usually means corn starch, polenta sits roughly where a Mexican cook expects to find masa, and none of the three things on that shelf will make a tortilla.

Get this one purchase right and tortillas, tamales, sopes, gorditas, tlacoyos, huaraches and atole all open up. Get it wrong and you will produce a crumbling disc that cracks when you fold it, and reasonably conclude that tortillas are hard, which they are not.

The four things on the shelf, and which one you need

Masa harina, nixtamalised maize flour

This is the one. Dried maize is cooked in an alkaline solution, traditionally with slaked lime, then steeped, washed, ground and dried. That process, nixtamalisation, changes the maize chemically: it breaks down the hull, releases bound niacin so the grain is nutritionally far better, develops the characteristic aroma, and, critically, alters the starch and protein so that the reconstituted dough becomes cohesive and elastic enough to hold together.

The label will say masa harina, or nixtamalised maize flour, or maize flour treated with lime, and the ingredient list will name lime, calcium hydroxide or an equivalent. If no alkaline treatment is mentioned anywhere, it is not masa harina, whatever the packaging suggests.

Cornflour

In Australia, cornflour usually means corn starch, the pure white powder used for thickening. Worse, some Australian products sold as cornflour are wheat starch rather than maize at all, which matters enormously if anyone at your table avoids gluten; the label must say so, and it is worth reading. Either way, it is a thickener. It will not make a tortilla and it is not masa.

Polenta and cornmeal

Coarsely ground dried maize, untreated. Excellent for polenta. It has not been nixtamalised, so it lacks the cohesion masa needs, and a dough made from it falls apart on the press. Finely ground cornmeal is no better; the problem is chemical, not mechanical, and you cannot grind your way to masa.

Plain maize flour

Finely ground untreated maize, sometimes sold in health food aisles. Same problem as polenta. Not a substitute.

Why Australia imports it

Australia grows maize, but overwhelmingly for stockfeed and industrial processing rather than for food-grade nixtamal, and there is no large domestic nixtamalisation industry serving retail. So masa harina is an imported product, which explains both the price per kilo and why it is far more available in specialist channels than in a general supermarket.

Where to buy it

• Latin American and Spanish grocers. The most reliable source, usually in larger bags, and the most likely to have both white and yellow masa and to have turnover fast enough that the stock is fresh.
• Online specialist retailers. The best price per kilo if you buy a large bag, with the usual Australian caveat that freight to Western Australia, the Northern Territory and Tasmania can be a significant line on the invoice.
• Larger supermarkets. Coles and Woolworths carry Mexican ranges in their world foods sections that sometimes include masa harina, in small packs at a high price per kilo. ALDI stock in this category appears and disappears with its limited-range model. IGA, Foodland and Drakes vary enormously by individual store, since independents stock to local demand.
• Health food and wholefood shops. Occasionally carry it, and are worth asking, but check the label carefully because untreated maize flour is much more common in these shops than nixtamalised.

On price

Prices move too fast and vary too much by state and channel to publish a figure that stays true. What holds is the shape: small supermarket packs are dramatically dearer per kilo than bulk bags, so convert to price per kilo using the unit price on the shelf label before deciding. The gap between the two formats is the single biggest lever on what Mexican cooking costs you in Australia.

White or yellow?

Both are correct. White masa is the default for tortillas across much of Mexico and gives a cleaner, more delicate flavour. Yellow masa is more assertively corny and is traditional for some regional dishes and for tamales in parts of the country. Blue and red masa appear occasionally and are worth buying when you see them. If you are buying one bag, buy white.

Storing it in an Australian climate

Masa harina contains enough residual oil to go rancid, and Australian summer pantries are warm for months at a time. A large bag left open in a Brisbane or Darwin kitchen will turn stale and faintly bitter well before you finish it.

• Decant into an airtight container the day you open the bag.
• In hot or humid regions, keep the working container in the fridge and the bulk in the freezer.
• Rancid masa smells like old nuts or crayons. Trust your nose; you cannot cook the flavour out.

Two notes on using it

First, hydration. Masa harina absorbs water gradually, so mix the dough, then let it rest for fifteen to twenty minutes before judging whether it needs more water. Most cracking problems are under-hydration diagnosed too early. The dough should feel like soft play dough and should not crack at the edges when you flatten a ball between your palms.

Second, measurement. Many masa recipes give the final water adjustment in tablespoons, and the Australian tablespoon is 20 ml, four teaspoons, against the 15 ml the recipe assumes. Measure those adjustments in teaspoons instead, or you will overshoot every correction by a third and spend the afternoon chasing the dough. There is a full guide to that trap.

For where to buy, see the store directory; for what to make once you have a bag, the recipe index; and if you would rather eat someone else's tortillas first, the restaurant listings.