Ninja Foodi 9-in-1 Multi Cooker OP350UK (6L) – pressure cook, air fry, slow cook & more in one pot

Overview

If you want one countertop cooker that can cover everything from quick midweek dinners to crispier results, the Ninja Foodi 9-in-1 Multi Cooker OP350UK is built around the idea of doing multiple styles of cooking in the same pot. It leans heavily on pressure cooking for speed and Air Fry for a “crisp finish” without going heavy on oil.

On paper, the appeal is the convenience: a 6L multi cooker with nine cooking functions, plus the ability to switch between a pressure lid and a crisping lid for different textures. It’s also aimed at households that want to batch-cook and then reheat, rather than cooking separate pots and pans for each step.

Still, it’s not perfect for every kitchen. If you mainly cook very small portions, a 6L unit can feel like overkill (and you’ll want to be mindful with the amount of ingredients). And as with most multi cookers, results depend a fair bit on using the right approach and quantity for your settings.

What it is and what you’ll use it for

This is a 9-in-1 multi cooker designed to handle a range of cooking methods in one appliance. The functions mentioned include pressure cook, Air Fry, slow cook, steam, bake/roast, sauté, roast, yoghurt, and dehydrate.

In practice, that’s the sort of setup you buy when you’re trying to reduce counter clutter and get fewer “half-cooked” compromises. A typical example: you might pressure cook chicken to get it tender, then switch to the crisping mode to add texture before serving. Or you could dehydrate ingredients for snacks, then air fry portions for a crisp side rather than turning on a full oven.

It’s also described as able to cook up to 4 portions, with capacity guidance such as 2 kg of chicken fitting in the 6L pot. If your household is often cooking for more than one person, that sizing tends to make more sense than smaller, single-purpose appliances.

Key features that make a difference in day-to-day cooking

The biggest “this is why it’s different” ideas are TenderCrisp, the pressure cooking speed claims, and the Air Fry approach.

• TenderCrisp is described as the system that lets you cook and then crisp by switching between the pressure lid and the crisping lid. The promise here is a proper finished texture, not just a soft pressure-cooked result.
• Pressure cooking is positioned as significantly faster than traditional methods. The information provided states “up to 70% faster” compared with slow cooking, simmering/slow cooking, or stewing, based on the referenced comparisons.
• Air Fry is presented as lower-fat than conventional frying. The information claims “up to 75% less fat” for the Air Fry function, tested against chips and hand-cut fries.

Also worth noting: there’s an “energy saving” claim too, stating you can save up to 45% on energy bills, based on time for recommended sausage cooking and comparison to conventional ovens. That’s the kind of headline that can be appealing, but it will depend on what and how you cook in your household.

Functions at a glance (and where they fit)

With nine cooking functions, the Ninja Foodi OP350UK covers a lot of the common menu patterns:

For fast meals, pressure cook plus the crisping approach is the headline combo.

For lighter cooking, the Air Fry setting aims for crisping with little or no oil.

For comfort food, slow cook and steam give you options beyond pressure.

For finishing touches and snack-style tasks, bake/roast, sauté, grill/roast (as listed), yoghurt, and dehydrating broaden what you can do without needing separate machines.

It’s a “do more, fewer appliances” type of product. If your current setup is split between a pressure cooker, air fryer, and maybe a slow cooker, this is the direction that reduces switching and cleaning.

The specs and included accessories you actually care about

You get a 6L cooking pot as part of the package. The listing also mentions key accessories that matter for day-to-day use:

A basket for cooking and preparing chips (listed as 3.6L), plus a two-level rack. There’s also a chef-created recipe guide, which can help you move beyond guesswork when you’re learning the timings and layering for multi-function cooking.

Who it suits (and who should pause)

It’s a good fit if you want a versatile multi cooker that can handle pressure cooking, Air Fry, slow cooking, steaming, and more without constantly changing appliances. It particularly suits households that cook for up to four people and want the convenience of doing speed + texture finishing in one unit.

It may not be the best choice if you mainly cook for one or two and rarely need a 6L pot. You might find it harder to use efficiently at small quantities, and the appliance can be more “all-in-one” than you actually need. Also, if you expect perfect results every time without following the recipe guide approach, you may feel let down—multi cookers reward correct quantities and method.

Energy and performance claims: worth interpreting carefully

The provided information includes several performance and savings claims: “up to 70% faster” for pressure cooking versus traditional methods, “up to 75% less fat” for Air Fry versus conventional frying tests, and “up to 45% energy savings” versus conventional ovens.

Those are encouraging benchmarks, but they’re based on specific test comparisons (for example, recommended sausage cooking times and particular frying comparisons). Your real-world results can vary quite a lot depending on portion size, how often you cook, and whether you already use an oven or another efficient cooker.

FAQs

Q: What makes the Ninja Foodi 9-in-1 different from a basic pressure cooker?

A: The listing highlights pressure cooking plus the TenderCrisp idea, where you can switch lids to add a crispier finish after pressure cooking.

Q: Is Air Fry meant to work with little or no oil?

A: The information states Air Fry can use little or no oil, and it also includes a “less fat” claim compared with conventional frying for chips.

Q: How much food can it handle?

A: The listing mentions up to 4 portions, and also gives guidance that 2 kg of chicken fits in the 6L pot.

Q: What’s included in the box?

A: The listing states a 6L pot, a chips basket (3.6L), a two-level rack, and a chef-created recipe guide.

Is it worth it?

Buy it if you want one multi cooker that covers pressure cooking speed, Air Fry crisping, slow cooking comfort, steaming, and even yoghurt and dehydrating—especially if you regularly cook for a small household and like the idea of finishing texture in the same machine.

Skip it or look closer if you only cook in tiny batches, because a 6L unit can be hard to justify for infrequent, small meals. Also, if you care most about one cooking style (say, slow cooking only), a single-purpose approach may feel simpler.

Final check before you commit

Before buying, it’s worth thinking about how often you’d realistically use the Air Fry + crisping lid sequence, and whether the 6L capacity matches your usual portions. If it does, the Ninja Foodi OP350UK reads like a practical “jack of most trades” cooker rather than a gadget you’ll use once in a while.