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Cast iron griddle induction hob

Updated: 23 October 2026

You cook on a glass induction hob, the listing says all hobs, and the zone beeps and stays cold. A cast iron griddle can work on induction because the metal is magnetic. It fails when a lip or the ridges hold that metal too far off the glass. This page is that contact problem: detection, scratches, and a slow preheat. Weber fit and the full size guide sit elsewhere. Ranked plates are on the [cast iron griddle plate comparison](/hub/grill-accessories/griddle-plate-cast-iron). We used Which? and the amazon.co.uk reviews in this set. We did not lab-test hobs. Updated 20 October 2026.

You cook on a glass induction hob, the listing says all hobs, and the zone beeps and stays cold. A cast iron griddle can work on induction because the metal is magnetic.

Our top picks

nuovva nuovva reversible cast iron griddle, 50 x 25 cm

Best overall

nuovva nuovva reversible cast iron griddle, 50 x 25 cm
8.8/10about £39.99
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OVERMONT OVERMONT reversible cast iron griddle, 51.2 cm

Best value

OVERMONT OVERMONT reversible cast iron griddle, 51.2 cm
8.4/10about £29.17
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NutriChef NutriChef reversible cast iron plate, 45.7 cm

Alternative

NutriChef NutriChef reversible cast iron plate, 45.7 cm
8.0/10about £41.69
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On this page
  1. 1.Why the metal is not the whole test
  2. 2.Lips and ridges
  3. 3.Glass and heat
  4. 4.What this set claims

Why the metal is not the whole test

Which? says cast iron works on induction because it is magnetic. A fridge magnet should stick firmly to the flat face. If it does not, the plate will not heat. Magnetism is necessary and it is not sufficient. The coil has to sit close to the iron. A gap under the rim is enough for many hobs to beep and switch off. Ridges facing the hob heat unevenly even when the zone starts. An Emba line that mentions induction is not a buy: OPSS alert 2502-0151 recalls named Emba cookware. Cast iron is a weak sideways conductor. Which? says the hot area tracks the zone. A 50 cm plate on one zone cooks in a patch. Use a bridge only if your hob has one. How to read the rest of a listing is the cast iron griddle plate buying guide.

Lips and ridges

The failure in this set is a raised lip. NutriChef’s title says the 45.7 × 25.4 cm plate is induction safe. Reviews say a lip about 1 cm high stops the hob detecting it. Velaze reviews in the shared 1,810-review pool say the same. OVERMONT’s bullet says induction, and the reviews disagree: one buyer could use only the flat side, one says it is not suitable, and one says it worked. The condition is contact. Put the flat side down. The ridged side is for food, not for the glass. Ridges against the hob leave air gaps. Do not grind the lip off. That can thin the casting and leave a sharp edge on glass. If the flat face rocks, or a piece of card slides under the rim all the way round, this plate is the wrong tool for this hob. A gas hob does not care about that gap.
nuovva nuovva reversible cast iron griddle, 50 x 25 cm

Testsieger

nuovva nuovva reversible cast iron griddle, 50 x 25 cm
8.8/10about £39.99
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Glass and heat

Lift the plate. Do not slide it or drop it. Which? says grit and a sharp rim scratch ceramic glass, and a heavy plate can crack it. Wipe the underside. Do not leave a cloth on the zone while you cook. Preheat on low. Induction rises faster than gas, and a cold thick plate can warp or crack on a sudden full-power cycle. If it bows and stays bowed, that is a return. Do the first heat while you can still reject the goods. Oil goes on after the plate is warm and dry, in a thin coat. A pool of oil does not fix a lip. If the hob still will not start, another oil will not close the gap.

What this set claims

Read the induction line as a claim to test. NutriChef’s title says induction safe, and reviews describe a lip of about 1 cm. Ignore the feature bullets, which describe shelves. The lighter Velaze names induction in recommended uses and says gas on the compatible-devices line. Reviews cite the lip. The two Velaze listings share text, so the dearer one is not a second successful test. OVERMONT claims induction and the reviews conflict, including a report that only the flat side worked. Dayacoco lists induction in a bullet and also leaves the question unanswered. Mihoho’s bullet says yes, and there is no review text. nuovva, the top pick in this set for a gas hob or barbecue, only asks the induction question. The onlyfire inserts do not claim a hob. None of the review counts is an induction lab.

Common questions

Is cast iron magnetic enough for induction?
Often yes. Which? says it works because a magnet sticks. The hob still needs the iron close to the glass. A magnetic plate with a lip of about 1 cm can be the right metal and the wrong shape. The magnet test and a flush sit both have to pass.
Why does the hob beep and do nothing?
The zone cannot see a pan. On these griddles the usual cause is a lip, or the ridged side facing the glass. Dry the underside, put the flat side down, and try a low setting. If a piece of card slides under the rim, a higher power step will not help.
Will it scratch the glass?
It can, if you slide it or drop it. Which? tells you to lift cast iron and not to drag it. Grit on the underside scratches as well. Plates in this set weigh from about 2.3 kg to more than 5 kg, which is enough to damage glass if you mis-set one.
Does a 50 cm plate heat evenly on one zone?
No. Cast iron does not spread heat like a layered pan, so the hot patch follows the zone. A 50 × 25 cm plate on one zone leaves the ends cooler. Use a bridge function only if the manual allows that pan.
How do I preheat without cracking the plate?
Start low and wait several minutes. Add a thin coat of oil once the plate is warm, then raise the heat. Do the first cook while you can still reject a crack. A slow preheat does not repair a lip the hob cannot see.

Related pages

How to season a cast iron griddle

Best cast iron griddle plate

Cast iron griddle plate

Cast iron griddle plate buying guide for hob or BBQ

Cast iron griddle for Weber: Spirit and Genesis fit

Sources

Public UK sources used for this comparison. Listing prices, stars, and review counts are from amazon.co.uk on 19 October 2026.

  1. Regulation (EC) No 1935/2004, food-contact materials (retrieved 19.10.2026)
  2. SI 2012/2619, materials and articles in contact with food (England) (retrieved 19.10.2026)
  3. General Product Safety Regulations 2005 (retrieved 19.10.2026)
  4. GOV.UK — General Product Safety Regulations 2005, Great Britain (retrieved 19.10.2026)
  5. OPSS product recall — Emba cast iron cookware 2502-0151 (retrieved 19.10.2026)
  6. Consumer Rights Act 2015, section 22 (retrieved 19.10.2026)
  7. Which? — how to buy cast iron pans (retrieved 19.10.2026)
  8. BBC Good Food — how to season cast iron (retrieved 19.10.2026)
  9. Netherton Foundry — cast black spun iron care (retrieved 19.10.2026)
  10. Weber UK — griddle 6790 (retrieved 19.10.2026)