Takoyaki Pans: Cast Iron, Copper, or Non-Stick?

A takoyaki pan is a plate of half-spheres, and every one of them is a small test of the same thing: whether the batter lets go of the metal when you turn it. On a good plate with a good oil film, a skewer flicks each ball over and the raw batter underneath runs down to form the other half. On a bad one, the shell tears and you’re left scraping. Almost everything about choosing and caring for a takoyaki pan comes back to that moment. Here is how to pick one, and how to keep it releasing.

The short answer

• Cast iron is the street-stall standard, and the one to buy if you want crisp outsides. It’s heavy, holds heat, and gets better with every batch — as long as you keep it oiled and dry.
• Copper cooks faster and softer, and costs the most. It’s the metal of Akashi’s eggy akashiyaki more than of everyday takoyaki.
• Non-stick electric or cassette-gas plates are the party option. Easy, forgiving, and a wear part you’ll eventually replace.
• Check the heat source before you buy. Many cast-iron plates are gas-only, and copper never works on induction.

Where the pan came from

Takoyaki is an Osaka food, and a young one. Its predecessors were choboyaki and radioyaki — the second named after the radio broadcasts that began in the late Taishō era — snacks popular from the Taishō into the Shōwa era; Osaka’s tourism bureau describes choboyaki as a water-and-flour batter poured onto a copper or iron plate with semicircular depressions, filled with pickled ginger, konjac and spring onion, and sold in sweet shops for children. Swap the water for dashi and add octopus and you have takoyaki.

Who made that swap first is disputed, but the usual credit goes to Aizuya, a shop in Osaka’s Nishinari ward, whose founder is generally said to have put octopus in place of beef sinew in 1935. Takoyaki shops only began spreading through the city in the 1950s, and the sauce-mayonnaise-bonito style is a postwar habit borrowed from okonomiyaki.

The plate itself, in other words, is older than the dish.

The metals

Cast iron (鋳鉄). The workhorse. Professional takoyaki stands mostly cook on thick cast iron, and the reason is heat storage: a heavy iron plate barely drops in temperature when a jug of cold batter goes in, so the outside of each ball sets into a crisp shell while the middle stays loose. That’s the soto-kari, naka-toro texture — crisp outside, molten inside — that Osaka takoyaki is judged on. Iwate’s Nanbu ironware makers produce home-sized plates; OIGEN’s Tetsudako, for example, is a 2.5 kg cast-iron plate with sixteen 44 mm holes, designed to sit on a cassette stove. The costs are weight, a seasoning routine, and rust if you put it away wet.

Copper (銅). Copper carries heat several times faster than iron, so a copper plate comes up to temperature quickly and spreads it evenly across every hole. Balls cook faster and set more gently. That’s why copper is the pan most associated with Akashi, west of Kobe, where akashiyaki — called tamagoyaki locally — is made from an egg-heavy batter, served soft and dipped in warm dashi. For ordinary takoyaki, copper is a specialist’s choice: expensive, and it discolours with use. Copper isn’t magnetic, so it won’t work on induction.

Aluminium or steel with a non-stick coating. This is what many Japanese households actually own — an electric hotplate with a takoyaki insert, or a cassette-gas takoyaki maker brought out for a takopa (takoyaki party). The coating makes release almost automatic, which is the whole appeal for a first attempt. The trade-off: the balls tend to brown less crisply than on heavy iron, and the coating wears. Use bamboo skewers or heat-resistant resin picks, never metal, and you’ll get the longer end of its life.

Holes, size and heat source

Home plates mostly run from about 16 to 25 holes, with holes around 4 cm across; OIGEN’s iron plate is 44 mm, and some “big ball” plates go wider. Sixteen balls is a good number for two or three people eating as you go. For a crowd, a second plate beats a bigger one — a large plate is harder to get evenly hot on a home burner, and the holes at the edges lag behind.

A cassette stove is the usual answer for cooking at the table, and it’s what most cast-iron plates are designed around.

Seasoning a cast-iron plate

An iron takoyaki plate follows the same logic as any Japanese iron pan — the full method is in Iron Pan Care: Seasoning, Washing, and Keeping It Black. The short version, adapted to a plate full of holes:

1. Check the finish first. Many Nanbu ironware plates leave the workshop with a baked-on finish that is meant to stay — don’t burn it off. Some bare iron plates ship with an anti-rust coating that the maker tells you to heat off until it smokes. Follow the paper in the box.
2. Wash, then dry it on the heat. Rinse off the dust and put the plate over medium heat until every hole is dry.
3. Season it (abura-narashi, 油ならし). Oil every hole generously and fry a handful of vegetable scraps — cabbage leaves work — pushing them into the holes so the oil is worked into the surface.
4. Let it cool, then rinse and dry again. Wait until you can touch the plate before it meets water, brush it out with warm water, and dry it over the flame.

The plate will release badly for the first few batches. That’s normal: the oil film builds with use, and a well-used black plate is the one that turns cleanly.

Using it — the parts people get wrong

• Heat the plate properly before oiling. Batter on a lukewarm plate glues itself to the metal. On an electric maker with a dial, recipes commonly give around 220 °C.
• Oil every hole, every batch. Use an oil brush or mop (abura-hiki, 油引き) to coat every hole and the flat between them. A new iron plate wants more than a well-seasoned one.
• Overfill. Pour the batter until it floods past the holes and covers the plate. The excess is what you tuck in to make a full sphere.
• Wait, then cut and turn. When the edges turn white, run your pick along the grid lines to separate the holes, then turn each ball 90 degrees first, folding the overflow in, and only then turn it fully over. The quarter-turn lets the still-liquid batter run out and form the other half.
• Swap the slow holes. Every plate has hot and cool spots. Once the balls are round, move the pale ones into the holes that brown fastest.
• Use the right pick. A slim metal awl (senmai-dōshi, 千枚通し) suits iron — OIGEN packages one with its plate; on non-stick, switch to bamboo skewers or resin picks.
• Keep the heat steady at medium. A heavy iron plate does the work; cranking the flame mostly burns the oil.

Washing and storage

• Iron: wash with hot water and a brush, no detergent by default, then dry it over the heat and wipe a thin film of oil into the holes before storing. Wrapping it in paper and keeping it somewhere dry helps. Rust spots scrub back and re-season — see the iron pan guide.
• Copper: follow the maker’s instructions; in general wash it by hand, no metal scourers, and dry it completely.
• Non-stick: a soft sponge and dish detergent, no abrasive pads. Check whether the plate is dishwasher-safe before assuming it is.

How to choose

One honest rule: the takoyaki plate that releases cleanly is the one that’s been used. An iron plate that comes out once a year will stick every time; one that makes dinner every few weeks turns black and slick and starts to feel like cheating. If you’ll use it twice a year, buy non-stick. If you want it to get better, buy iron and cook in it often.

For the rectangular cousin, see Tamagoyaki Pans: Choosing the Shape and the Metal, and for where much of Japan’s cast iron comes from, Nambu ironware in Iwate.

Browse hand-picked, Japan-shipped ironware on The Table.

Sources & Further Reading

• Osaka Convention & Tourism Bureau — Takoyaki — The city’s own account of takoyaki’s roots in choboyaki and radioyaki, cooked on copper or iron plates with semicircular hollows, and of shops spreading from the 1950s.
• Ministry of Agriculture, Forestry and Fisheries — Our Regional Cuisines: Takoyaki — The ministry’s regional-cuisine entry for Osaka: takoyaki’s descent from choboyaki and radioyaki, octopus arriving at Osaka stalls in the early Shōwa era, and the method — a 220 °C plate, batter filling the whole plate, a 90-degree turn first.
• OIGEN — Tetsudako Cast-Iron Takoyaki Pan (Japanese) — A Nanbu ironware maker’s specifications for a home cast-iron plate: sixteen 44 mm holes, 2.5 kg, cashew finish, open flame and electric coil hobs but not induction.
• OIGEN — Seasoning Iron Pans and Pots for First Use (Japanese) — The same maker’s first-use method: wash, dry over medium heat, fry oil with leafy vegetable scraps, and let the iron cool before it meets water.