Precautions

Immersion blenders are great conveniences because you don’t need to dirty the blender—the immersion blender can just be rinsed off—and there’s no transferring of hot liquids from one container to another. If you’re pureeing hot soup in a regular blender, never fill the blender more than half full. Hold the lid on tightly with a kitchen towel and start by pulsing on the lowest speed. Gradually increase the duration and speed of the pulses until the air inside the blender has heated up and no longer threatens to burst out the top.