Who is this for?

Solo cooks with limited worktop space

If you mainly bake one gratin dish at a time, the dish’s fit, usable shelf height and ventilation space matter more than a large stated capacity.

Single-person cooks replacing several appliances

If you also want to roast, grill or use integrated hotplates, additional functions may matter more to you than choosing a straightforward baking oven.

Cooks who want control over baking

If timing and top browning are priorities, look for a convection or fan-assisted baking setting, adjustable temperature, a timer and a suitable shelf position for your dish.

What matters when choosing?

For one gratin, establish that your dish and worktop can accommodate the oven before deciding which additional cooking functions you would use.

Compact convection mini oven

Choose when: Gratin and ordinary oven baking are your main uses.

Trade-off: A compact format still needs enough usable shelf space for your particular dish.

Mini kitchen with hotplates

Choose when: You would use integrated hotplates to prepare other parts of a meal.

Trade-off: The hob functions may be unnecessary if you mostly bake one dish; check the complete appliance’s footprint.

Multifunction air-fryer oven

Choose when: Air-frying and other cooking modes will be part of your regular routine alongside baking.

Trade-off: Extra programmes do not establish that a gratin dish fits or that its shelf position suits browning.

Concern What to check Who this matters to
Dish fit and placement Compare your dish’s outside dimensions, including handles, with the usable rack space. Check the exact oven’s ventilation instructions against your worktop. I need my usual gratin dish to fit without putting the oven somewhere unsuitable. Around 44% of consumers put dish fit and safe placement first.
Other cooking uses Identify the additional modes you would use regularly and check the accessories supplied with the exact model. If this appliance will also handle other small meals, I want functions I will actually use. For around 33% of consumers, versatility is the primary need.
Baking controls Look for a convection or fan-assisted baking setting, adjustable temperature, a timer and a suitable shelf position. I want to control the cooking time and position the dish so its top can brown. Baking control comes first for around 23% of consumers.

Mistakes to avoid

  • Assuming litre capacity proves the dish will fit

    A capacity figure does not show usable rack dimensions, space above the dish or whether its handles clear the door.

    Measure the dish and compare it with the exact model’s internal or rack dimensions before ordering. If those dimensions are unavailable, do not assume it fits.

  • Using another oven’s ventilation clearances

    Placement instructions vary by model. The Russell Hobbs 22780 manual specifies at least 50 mm all round; a Cookworks 23L mini-oven manual specifies at least 12 cm on all sides and 50 cm above.

    Check the manual for the oven you intend to buy and make sure its required clearances are possible on your worktop.

  • Choosing extra modes just for gratin

    Air-fry or rotisserie functions do not replace the need for a suitable baking setting, dish fit and rack position.

    Choose additional functions for the other meals you expect to cook, not as a substitute for checking how the oven accommodates your gratin dish.

  • Warming leftovers without heating them through

    A gratin can feel hot at the edges while its centre is not thoroughly reheated.

    For reheating, GOV.UK’s food-business guidance says to heat food until it is steaming hot throughout and to reheat it only once.

Brands to consider for countertop ovens

Tefal

Tefal offers both the 19L Optimo OF445840 convection mini oven and the 15L Easy Fry FW556DG0 multifunction air-fryer oven.

  • Tefal lists a thermostat, timer and convection mode for the Optimo OF445840; it lists a bake mode among the FW556DG0’s functions.
  • The FW556DG0’s additional functions may be unnecessary if you mainly bake a single gratin. Check the dish fit of either exact model.

Russell Hobbs

The 22780 Mini Kitchen is an option for cooks who want a fan-assisted oven and integrated hotplates in one countertop appliance.

  • Russell Hobbs specifies a 30L oven, a 60°C–230°C thermostat and double hotplates for the 22780.
  • If you will rarely use the hotplates, check whether this appliance’s footprint and required clearances suit your worktop.

Cookworks

A Cookworks 23L mini-oven manual provides a useful reminder to assess an exact model’s installation requirements alongside its cooking features.

  • The 23L model’s manual gives specific instructions for domestic indoor placement and ventilation.
  • Those instructions apply to that model; check the cooking modes, dimensions and manual of any other Cookworks oven separately.

Joybuy oven option

This multifunction air-fryer oven is worth considering if you want to cook other small meals as well as gratin. Confirm its baking settings and that your dish and worktop suit the exact model.

Tristar Multi Crispy FR-6964 air-fryer oven

Tristar Multi Crispy FR-6964 10L air-fryer oven

Consider this air-fryer oven if you also want an appliance for other small meals, provided its baking settings suit your gratin.

The product name specifies 10L capacity, 1800W, touchscreen controls and 10 programmes.

Before ordering, compare your dish with the usable rack space and check the exact model’s ventilation clearances for your worktop.

View on Joybuy

Common questions

What oven capacity do I need for one portion of potato gratin?

Choose by dish fit rather than litres alone. Measure the outside of your dish, including its handles, and compare it with the exact oven’s usable rack width, depth and height. A compact oven is suitable only if the dish fits with appropriate clearance.

Do I need an air-fryer oven to make potato gratin?

No: a convection or fan-assisted mini oven with suitable temperature controls can bake gratin. An air-fryer oven makes more sense if you will also use its other cooking modes and your dish fits its baking arrangement.

How much space should I leave around a countertop oven?

Follow the exact model’s manual, as clearances differ. The Russell Hobbs 22780 manual calls for at least 50 mm all round, while a Cookworks 23L mini-oven manual calls for at least 12 cm on all sides and 50 cm above.

Can I reheat leftover potato gratin in a countertop oven?

Yes, provided you reheat it thoroughly rather than merely warming the surface. GOV.UK’s guidance for food businesses says reheated food should be steaming hot throughout and reheated only once.