Blender Basics

Blending Hot Liquids and Soups

by Carmen G.
Updated September 10, 2018
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Soup Anyone?

Making soup is an excellent use of your blender! And if done safely, you’ll love using your blender to make soup. But it can be tricky. Whether you’re starting with hot liquids or starting with cool ingredients and planning to heat them up in the blender, the protocol is different than cooler blending jobs. And since not all blenders can handle hot liquids—and only a few actually heat up the ingredients while they blend—you’ll want to check your manual or do a quick internet search to see if you have a blender that can take the heat. This is important.

What’s Tricky About Blending Hot Liquids?

For starters, you’ll be working with less liquid so this means you may have to work in batches. That’s because you shouldn’t fill the blender more than half full—even if all your ingredients can fit. If you do, you’re going to have liquid bubbling out the sides or risk an even bigger hazard due to the steam build up inside. Venting the lid or leaving the hole in the top of the lid open (if your blender lid has one) will also be necessary to prevent the steam from building up inside the pitcher. Just make sure you cover the opening or vented lid with a towel and hold it down well. These steps are even more important when you are starting with hot liquids or ingredients. Often it’s wise to let them cool down a little before blending or putting the lid on.

Why? What Makes Hot Liquids Different?

First of all, hot liquids have a thinner texture than cold ones. So hot soup will form a higher vortex inside the pitcher than something colder like a smoothie. This means that the liquid will rise up towards the top and can blow the lid off. What’s more, hot liquids make steam. So even if the vortex doesn’t push the liquid too far up, the steam inside can cause pressure to build—and that can lead to a big hot (and possibly dangerous) mess.

So which blender is best for hot liquids/soups? The Ninja Foodi is a new high-powered glass blender that is worth checking out. Another good option (and slightly more affordable) is the Oster Pro 1200.

Hot Liquid Tips:

  • Cool it down. Let the soup cool off a bit before you blend so there’s less steam.
  • Don’t overfill. Never fill the blender more than halfway—do batches if needed.
  • Vent the lid. The steam needs to be allowed to escape.
  • Cover. Use a kitchen towel to cover the lid or lid opening and hold it in place with your hand.
  • Start slowly. Start the blender on a slow speed and then turn it up—once the vortex gets going, the liquid won’t continue to splash as it does in the beginning.

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