Choose an air fryer for a one-person potato gratin by checking whether your ovenproof dish fits inside the cooking space, including room above it, before choosing by litre capacity. Instant Pot UK recommends at least 3.8L as a starting point for cooking for one or two people, but that figure cannot confirm dish fit. Baking or grilling functions may give you useful options for cooking and finishing the gratin; the exact dish and recipe still matter.
If you want to keep using an ovenproof dish you own, its outside dimensions, handles and height are more useful to your decision than basket capacity alone. Instant Pot UK specifically advises considering whether existing dishes fit.
You need room for one serving without choosing an appliance solely for its large combined capacity. Compare the appliance footprint as well as the usable space inside its basket or container.
If a browned cheese top matters to you, consider the cooking functions alongside dish clearance. A finishing function does not tell you whether the potato layers underneath are ready.
For a one-person gratin, establish dish fit first, then weigh the appliance footprint, cooking options and routine upkeep against how you will use it.
| Concern | What to check | Who this matters to |
|---|---|---|
| Dish fit | Compare the dish’s outside width, depth and height, including handles, with the exact cooking space. Check the manual’s cookware and clearance guidance. | If I already have a gratin dish, I want to know it will fit without crowding the space above the topping. Around 33% of consumers would make dish fit their primary concern. |
| Size for one | Compare worktop footprint and storage space, then check the basket itself rather than relying on its litre rating. | In a small kitchen, I want space for one serving without a larger appliance taking up more room than I can spare. Roughly 27% of consumers would put practical size first. |
| Baking and browning | Check the exact model’s cooking functions and adjustable controls; follow a suitable recipe and assess the centre separately from the top. | If I often make gratin, I want to cook the potato layers through and have an option to finish the cheese topping. Around 20% of consumers would prioritise those cooking options. |
| Everyday upkeep | Read the model’s cleaning and cookware instructions, and check safe placement and current recall information. | When sauce or cheese spills, I want cleaning and routine operation to be manageable. Approximately 20% of consumers would place upkeep and safe use first. |
Capacity does not tell you the basket’s shape or whether a handled dish has enough room above it. A dish that cannot fit could mean using a different ovenproof dish.
Measure your dish externally and compare it with the exact model’s internal dimensions and cookware guidance.
COSORI UK lists a 2L Mini, while Instant Pot UK recommends at least 3.8L as a starting point for one or two people. Neither capacity establishes whether your particular dish fits.
Only choose a smaller format after checking the cooking space against the dish you intend to use.
A browned surface is not a check of the potato layers in the centre.
Follow the recipe or packet instructions and check the middle before serving. The Food Standards Agency advises following cooking guidance and checking that food is cooked completely.
Electrical Safety First warns against overfilling an air fryer or connecting it through an extension lead.
Follow the appliance manual, use a suitable wall socket and check current recall information for the model before use.
Its UK range includes single-basket Vortex models as well as dual-zone and flexible-zone formats.
The Philips HD9200/91 is a 4.1L single-basket model listed with bake and grill functions.
COSORI UK lists formats ranging from a 2L Mini to larger single- and dual-basket models.
These choices cover single-basket air fryers, a glass-container cooking system and a divided basket that can be used as one space. For a one-person gratin, compare the cooking space with your intended dish before choosing between their formats and functions.
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Consider this single-basket format if you want to cook one dish at a time and have room for a larger appliance.
The product name specifies a 6.2L single basket and a viewing window. Check the basket’s internal dimensions and cookware guidance against your dish; the capacity alone does not establish fit.
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This 5L option is worth comparing if you mainly cook one gratin and want to assess a smaller stated capacity than the 6.2L model above.
Its name identifies a 4-in-1 compact air fryer. Compare its actual worktop footprint and internal cooking space with your kitchen and dish rather than treating “compact” or 5L as a fit guarantee.
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Consider this container-based format if cooking a smaller portion in a supplied glass container appeals more than using a conventional basket.
The product name specifies 3.8L, 1700W, two removable glass containers with lids, and Air Fry, Roast, Keep Warm and Recrisp functions. Check the container dimensions and cookware instructions before planning to use your own gratin dish.
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Consider this flexible basket if you also want to cook more than a single gratin; for one portion alone, assess whether its worktop footprint is practical.
The product name lists Bake and Grill functions and a removable divider. Check the undivided basket’s internal dimensions against your dish, and allow the stated ventilation clearance of at least 10cm at the back and sides.
Start with the dish you intend to use. Instant Pot UK recommends at least 3.8L for cooking for one or two people, but you still need to compare your dish’s outside dimensions, including handles, with the exact cooking space and clearance guidance.
A single undivided cooking space is the more direct format to check when one gratin is your main task. Consider separate drawers if you also regularly cook another food at different settings, but measure the drawer that would hold the gratin rather than relying on combined capacity.
Neither mode replaces checking dish fit or following a suitable recipe. Bake and Grill are relevant options if you want more control over cooking and finishing a gratin, but check the potato layers in the centre rather than judging readiness by the browned cheese.
Follow the recipe or packet instructions and check the centre as well as the surface. The Food Standards Agency advises cooking food completely and using visual checks and, where appropriate, a food thermometer; a browned topping alone is not enough.
Follow the model’s manual, avoid overfilling it and connect it to a suitable wall socket rather than an extension lead, as Electrical Safety First advises. Check current recall information for the model before use.