Can you blend hot liquids? Soup, steam and blender safety
Short answer: sometimes. You can blend hot soup in some full-size jug blenders, but only if the manual allows it, and only with a vented lid, a part-filled jug and a low starting speed. You should never blend hot liquids in a sealed personal (bullet) cup. Heat builds pressure in a sealed container, and the contents can burst out when you open it. If your manual doesn’t mention hot liquids, assume the answer is no.
Last checked: 22 October 2026, against NutriBullet UK and Vitamix manuals and FAQs. This is general safety guidance; your model’s manual always takes priority. Part of our blender guides.
Why hot liquids are risky in a blender
Blending hot food traps steam. In a closed container that steam has nowhere to go, so pressure builds. NutriBullet’s user guides warn that heated ingredients can pressurise sealed containers when blended and violently expel hot contents on opening. They also warn that, even in a pitcher, ingredients can splash and cause burns if the lid isn’t fitted correctly.
Friction matters too. Blades turning at high speed warm the ingredients, so even a cold mixture gets warmer the longer it runs. NutriBullet’s safeguards say not to run its sealed vessels continuously for more than one minute, and if a vessel feels warm, to let it cool before opening it carefully, pointed away from you.
Personal (bullet) blenders: no hot liquids
NutriBullet is unambiguous: never blend hot or carbonated ingredients in any sealed NutriBullet cup. Start with cool or room-temperature ingredients. Fizzy drinks are banned for the same reason as hot ones: gas builds pressure.
Treat any personal blender, and any portable or cordless cup, the same way unless its manual clearly says otherwise. The cup screws shut and has no vent, so heat has nowhere to escape. Vitamix applies the same logic to its own small container: its UK FAQ says its 20-ounce container can carry hot liquids but can’t be used to blend hot ingredients, because it has no vent to release steam.
More on the differences between types is in personal vs full-size vs portable blenders.
Jug blenders: how to blend hot soup safely
If your jug blender’s manual says hot liquids are allowed, follow its method exactly. The steps below are common to the manuals we checked.
- Let very hot food cool a little first. Vitamix’s UK FAQ says not to put anything hotter than 77°C (170°F) in its containers. That’s the temperature its blenders can reach through friction. Other brands may set different limits, so check yours.
- Fill less than you would for a cold blend. Vitamix Europe advises filling no more than half full for hot ingredients (three-quarters for cold), because heat expands during blending. NutriBullet says to keep liquids and solids below their MAX lines.
- Fit the lid properly, with its vent. NutriBullet says never to blend hot liquids in its pitcher without the pitcher lid and vented lid cap attached. The cap lets steam and pressure out while limiting splashes.
- Start on the lowest speed, then increase gradually once the ingredients are moving. NutriBullet’s pitcher instructions start hot blends on LOW.
- Keep a hand on the lid, using a folded tea towel, and keep your face and hands away from the vent. NutriBullet warns that steam and splatters can escape through the vented lid and cause burns.
- Don’t add ingredients through the vent while blending hot food (NutriBullet).
Lid plug in or out? Follow your own manual
Manufacturers don’t all agree on this detail. NutriBullet’s pitcher method keeps its vented lid cap in, because the cap itself is designed to vent steam. Vitamix Europe’s tips say to remove the lid plug so steam can escape, and to keep one hand on the lid. These are different designs, so don’t swap the advice between brands. Do what your model’s manual says.
Blenders that heat soup themselves
Some high-speed blenders can warm a cold soup through blade friction alone. Vitamix says most of its models can bring soup to a “steamy” temperature, and its European tips say to start with room-temperature or warm ingredients, not ones straight from the fridge. The same half-full and venting rules apply. Some other blenders have built-in heating elements and their own instructions. Only use a “soup” programme if your blender has one and you’ve read that section of the manual.
Safer alternatives
- Let it cool first. Let soup cool until it’s warm rather than piping hot, blend, then reheat it in the pan until it’s steaming hot before serving.
- Blend in batches so the jug is never more than the manual’s hot-fill limit.
- Use a stick (hand) blender in the pan, which avoids a closed container altogether. Follow its own manual.
If you’re making soup ahead, cool it quickly and refrigerate it within one to two hours, as the Food Standards Agency advises in its chilling guidance. Don’t leave it standing warm in the blender jug.
Warm drinks and other hot ingredients
- Hot tea, coffee or hot milk in a personal cup: no. These are the same sealed-cup risk as soup.
- Cooked but cooled ingredients, such as roasted veg or cooked oats at room temperature, are fine in any blender, within its normal limits.
- Cleaning with hot water: don’t. Vitamix warns that hot water expands while blending and can lift the lid, so its self-cleaning method uses warm water. See how to clean a blender.
At a glance
| Blender type | Hot liquids? | What the manuals say |
|---|---|---|
| Personal / bullet cup | No | NutriBullet: never blend hot or carbonated ingredients in a sealed cup |
| Portable / cordless cup | Treat as no | Sealed cup with no vent. Only if its manual explicitly allows it |
| Full-size jug | Only if the manual allows it | Vented lid, part-filled, start on low, hand on the lid |
| High-speed jug that heats by friction | Yes, per the manual | Vitamix: no more than half full; nothing over 77°C added; vent as instructed |
FAQ
Can I blend hot soup in a NutriBullet?
Not in the sealed cups. NutriBullet says never to blend hot ingredients in any sealed cup. Its full-size NutriBullet Blender pitcher can be used for hot liquids with the pitcher lid and vented lid cap fitted, below the MAX lines, starting on LOW.
Can I blend hot soup in a Ninja?
It depends on the model and the container. Check the manual for the exact model you own. If it doesn’t say hot liquids are allowed, let the soup cool first or use a stick blender.
Why did my blender lid blow off?
Usually steam pressure from hot contents, or an overfilled jug. Vitamix says heat expands during blending, which is why it limits hot fills to half the container. Always vent as your manual instructs and start on low.
How hot is too hot to blend?
Vitamix says not to add anything above 77°C (170°F) to its containers. Other manufacturers may set their own limit or none, so if your manual doesn’t give one, let the food cool until it’s warm, not steaming.
Choosing a blender for soups as well as smoothies? A vented lid and clear hot-liquid instructions are worth checking. See how to choose a blender for smoothies.
Sources
- NutriBullet UK, nutribullet 600/900 Series user guide (sealed cups, hot and carbonated ingredients), checked 22 October 2026.
- NutriBullet UK, nutribullet Blender user guide (pitcher, vented lid cap, hot liquids), checked 22 October 2026.
- Vitamix UK, Frequently asked questions (hot ingredients, 20-ounce container, friction heat), checked 22 October 2026.
- Vitamix Europe, Tips and tricks (fill limits, lid plug, hot soup), checked 22 October 2026.
- Food Standards Agency, Chilling, checked 22 October 2026.