Space-first soup cooks
You need room to use and store the cooker as well as enough capacity for several portions. Instant Pot UK specifies its 3.8L Classic Mini at 31.8 × 35.1 × 25.6cm and describes it as suitable for up to four portions.
Who is this for?
Small-household convenience cooks
You want to sauté ingredients and pressure-cook soup in one appliance, with other everyday cooking functions available when you need them.
Batch-cooking soup makers
You make extra portions for meals or freezing and have space for a larger appliance. Instant Pot UK describes its 5.7L Duo as a six-portion model; Sage lists a 6L bowl but a 4L usable volume for the Fast Slow GO.
What matters when choosing?
Start with the space available for the cooker, then decide how many soup portions you need from one batch. Check the exact model’s pressure-cooking instructions before treating its stated bowl size as soup capacity.
| Concern | What to check | Who this matters to |
|---|---|---|
| Worktop and storage space | Measure the intended spot against the exact model’s exterior dimensions, allowing room to open the lid and direct steam safely. | I need to make soup without leaving an appliance in the way or struggling to store it. Around 42% of consumers put space first. |
| One-pot cooking and cleaning | Check for both sauté and pressure-cook functions, a removable inner pot and the manufacturer’s care instructions for each part. | If I soften ingredients before cooking the soup, I want to do it in the same pot and keep washing-up manageable. One-pot convenience comes first for around 33% of consumers. |
| Batch size and filling room | Compare usable volume where stated, then check the exact manual’s minimum-liquid and maximum-fill instructions for pressure cooking. | When I make soup for several meals, I need enough working capacity without filling the pot beyond its limit. For around 25% of consumers, batch quantity is the primary concern. |
What should you avoid?
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Choosing by headline litres alone
Bowl size is not necessarily the amount available for pressure cooking: Sage specifies a 6L bowl and a 4L usable volume for the Fast Slow GO.
Compare usable volume where stated and check the manual’s fill line against the batch size you want to make.
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Assuming a small bowl means a small footprint
The appliance still needs a suitable place to stand, room to open its lid and unobstructed vents.
Compare the exact model’s dimensions with your worktop or cupboard. Instant Pot’s Classic Mini manual calls for a stable, level, non-combustible surface and clear bottom vents.
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Ignoring the rules for pressure-cooking pulses
Split peas expand as they cook, while pressure-cooker programmes have model-specific liquid and fill requirements. USA Pulses advises rinsing split peas before cooking and notes that pulses can double or triple in volume.
Follow the packet and the exact cooker manual. For the Instant Pot Classic Mini, Instant Pot UK requires water-based liquid for pressure cooking and contents below the PC Max – 2/3 line.
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Buying without a traceable model
An Office for Product Safety and Standards report in 2026 identified a serious fire risk involving one specific 6L electric pressure cooker with earthing, fuse and plug-pin faults.
Keep the model number and purchase details so you can check official safety notices against the appliance you own.
Brands to consider
Instant Pot
Its UK range includes the compact 3.8L Classic Mini and the larger 5.7L Duo, giving soup makers a choice between smaller batches and more stated portion capacity.
- Instant Pot UK lists pressure cooking and sautéing among the Classic Mini’s seven functions and identifies dishwasher-safe components.
- The Classic Mini offers less batch room than the Duo. Its pressure-cooking instructions require liquid and set a PC Max – 2/3 fill line.
Ninja
The Foodi Mini OP100UK is relevant if air frying is a genuine second use alongside pressure-cooked soup.
- Ninja Kitchen UK describes the OP100UK as a 4.7L, 6-in-1 model with pressure-cook, slow-cook and air-fry functions.
- If you only intend to make soup, check whether you have space for the additional accessories and functions before choosing them.
Sage
The Fast Slow GO is a larger-batch option for cooks who want programme shortcuts and a choice of steam-release settings.
- Sage specifies 14 shortcuts, including Soup, Legumes and Sauté, plus a 6L bowl with a 4L usable volume.
- Its stated dimensions are 31.3 × 34.7 × 33.3cm; measure your available space rather than assuming the larger bowl will fit comfortably.
Joybuy products
Related products coming soon.
Common questions
Do split peas need soaking before pressure cooking?
Split peas do not need soaking, according to USA Pulses, but rinse them first and follow the packet’s directions. Allow for their expansion and follow the cooker’s fill instructions.
How much liquid and filling room does split pea soup need?
Use the instructions for your exact cooker and programme rather than transferring a quantity from another model. Instant Pot UK says the Classic Mini needs water-based liquid for pressure cooking and requires contents to stay below its PC Max – 2/3 line; its 375ml minimum applies to the specified canned, condensed or cream-based soup example with added water.
What should I do before using a new cooker?
Follow that model’s setup and test-run instructions. For the Instant Pot Classic Mini, Instant Pot UK instructs owners to wash and dry the inner pot, fit the condensation collector and complete a pressure-cooking test run before first use.
What electrical-safety checks matter when buying in Great Britain?
Choose a cooker whose model and supplier you can identify, and check official safety notices against that model. The Office for Product Safety and Standards explains that the Electrical Equipment (Safety) Regulations 2016 set requirements for electrical equipment placed on the Great Britain market; a plug description alone does not establish that a particular cooker meets them.