Who each hob suits

One-pan cooks with induction-ready pans

If you already have a pan with a magnetic base, a single induction hob is worth considering. Measure the pan’s flat base against the particular hob’s supported size range before choosing it for an onion batch.

Cooks using mixed cookware or two pans

A double solid-plate hob may suit you if your onion pan is not induction-compatible or you want another pan on the go. The VonShef model described by Tesco Groceries Marketplace has independently controlled zones and is stated to accept several non-induction pan materials.

Batch cooks with limited worktop space

A compact single hob is easier to accommodate than a two-zone setup, but its footprint is only part of the decision. Check that the pan you plan to use fits the hob and leaves enough room to spread the onions.

What matters when choosing

Start with the pan you will use and the space it needs, then decide whether adjustable heat on one zone or room for a second pan matters more.

Concern What to check Who this matters to
Gradual heat control Look at the selectable power settings and how you can adjust them while cooking; do not treat a temperature setting as the temperature of the onions. When I’m cooking onions in one pan for an extended session, I want to turn the heat down as they brown rather than rely on maximum output. Around 42% of consumers put gradual heat control first.
Pan fit and compatibility Measure the flat pan base and compare it with the hob’s supported diameter; for induction, check that the base is magnetic. If I want to use my existing wide pan, I need to know the hob will recognise and accommodate it before considering its controls. Pan fit is the primary concern for around 33% of consumers.
Second-zone flexibility Check whether both heating zones suit your pans and whether the appliance fits safely on the available worktop. When onions occupy one pan, I may need another zone for a separate component or want to use cookware that is not induction-compatible. Around 25% of consumers prioritise that flexibility.

Mistakes to avoid

  • Buying an induction hob before measuring the pan

    A magnetic pan can still be outside a hob’s supported size range. CASO Design specifies 12–22 cm cookware for the ProSlim 2000; that figure does not apply to every induction hob.

    Measure the pan’s flat base, check its magnetic compatibility and compare both with the instructions for the exact model.

  • Treating a temperature setting as an onion temperature

    Power and temperature settings describe appliance controls, not a guaranteed result in the pan. Pan size, onion quantity and stirring also affect how the batch cooks.

    Begin at a moderate setting, watch the browning, stir regularly and reduce the heat if the onions start to catch.

  • Choosing a single zone without checking the whole setup

    A compact hob may not suit your preferred wide pan, while a double hot plate needs room for the appliance and the pans you intend to use.

    Set out your intended pan or pans and measure the available worktop before deciding which format fits your batch-cooking routine.

  • Overlooking cooling and clean-up

    A hot plate can remain hot after cooking, and onions prepared for later meals need prompt cooling and refrigeration.

    Use a stable, heat-resistant surface, let the appliance cool before cleaning it according to its instructions, and put cooked onions away promptly.

Brands to consider for these hob formats

CASO Design

The ProSlim 2000 is a single portable induction hob for use with compatible cookware.

  • CASO Design specifies 10 power levels up to 2000 W, a timer and a 12–22 cm cookware range.
  • Check the base of a wide onion pan against that model’s stated range; the listed controls are not a test of caramelising performance.

Innoteck

The DS-5503 is a portable induction option for cooks using a ferromagnetic pan.

  • Innoteck states a maximum power of 2000 W, adjustable settings, eight presets and a timer.
  • Confirm the supported pan-base diameter for this model as well as the magnetic compatibility of your pan.

VonShef

Its listed double solid-plate hob offers two zones for cooks who need another pan or use non-induction cookware.

  • Tesco Groceries Marketplace describes independently controlled zones and compatibility with aluminium, copper, cast iron and non-magnetic stainless-steel pans.
  • Check that your pans sit securely on the rings and that the complete two-zone setup fits your worktop; the listing does not establish cooking evenness.

Tefal

The IH201840 Everyday Portable Induction Hob is a compact single-zone option listed by John Lewis & Partners.

  • The retailer describes a portable induction hob with touch controls.
  • Check its supported pan size and power settings against your intended onion pan before choosing this model.

Portable induction options on Joybuy

These single-zone induction hobs are options for cooking an onion batch in one compatible pan. If you need a second zone or want to use a non-magnetic pan, consider the double-hot-plate route discussed above instead.

IAGREEA DF200-14V10 2000 W induction hob

IAGREEA DF200-14V10 2000 W induction hob

Consider this model for a one-pan onion batch if your flat magnetic pan base falls within its stated 12–26 cm cookware range.

Its listing specifies eight power levels and a three-hour timer. Adjust the heat as the onions brown rather than treating a selected setting as their cooking temperature.

View on Joybuy
ochama 2000 W portable induction hob

ochama 2000 W portable induction hob

This single-pan option suits cooks who have ferromagnetic cookware and want selectable heat settings while the onions brown.

The listing specifies 10 power settings and six functions. Confirm the supported pan-base diameter against your intended pan before buying.

View on Joybuy

Common questions

Can I use my existing frying pan on a portable induction hob?

Yes, if its base is induction-compatible and falls within the particular hob’s supported size range. Innoteck specifies a ferromagnetic base for the DS-5503, while CASO Design states a 12–22 cm cookware range for the ProSlim 2000; check both requirements for the model you choose.

Does a double hot plate make sense for an aluminium onion pan?

It can, if you want to keep using that pan rather than switch to induction-compatible cookware. Tesco Groceries Marketplace states that the listed VonShef double hot plate accepts aluminium pans; also check that your pan sits stably on its heating ring and that the appliance fits your worktop.

How should I clean a portable hob after cooking onions?

Switch it off and let it cool before wiping it according to the manufacturer’s instructions. This matters particularly with a solid hot plate, whose surface can remain hot after use.

What should I do with caramelised onions cooked for later meals?

Cool and refrigerate the cooked onions promptly rather than leaving them out for a prolonged period. GOV.UK’s guidance for food businesses likewise calls for cooked food that will not be served hot to be cooled quickly; its business-specific holding temperatures should not be mistaken for a household hob requirement.