Yes — cooked vegetables are the easiest load a blender gets. A stick blender does it in the pot; a countertop blender needs the lid vented and the jar no more than half full when the contents are hot.
The stick blender case
In the pot. Nothing poured, nothing hot sealed in a jar, and one shaft to wash.
That removes the step where hot liquid goes into a closed vessel — the part of the countertop routine that goes wrong.
Submerge the blade guard before starting, and keep it under while the motor runs. Lift it out only after it stops, or the sauce spatters. See the immersion blenders page.
The countertop blender case
Hot contents push steam against the lid. The routine that avoids it:
- let it cool a few minutes off the heat;
- fill no more than halfway, because hot liquid needs headroom;
- take out the center cap and hold a folded towel over the opening;
- start on low, then raise the speed.
Check that your jar is rated for hot contents. Glass usually is; many plastic jars are not, and the manual says which. See the countertop blenders page.
Why the result is better than it looks
Cooked vegetables are soft and wet. A vortex forms at once and everything reaches the blade — which is why a sauce takes under a minute where a smoothie with ice takes longer.
What goes wrong
Foam, from a blade too near the surface or lifted while running. Deeper and slower fixes it, and a minute’s rest collapses most of it.
Grittiness, from skins and fibers. More time at a moderate speed beats more watts, and a fine strainer finishes the job.
What to add, and when
In a jar, liquid goes in first, so the blade has something to pull the solids into. In a pot, blend first and thin after — it is easier to add than to take away.
And the food processor
It purées cooked vegetables well, but holds little liquid: fill only to the blade with anything runny. The Hamilton Beach 12-cup has the one sealed bowl on this site; the Hamilton Beach 10-cup at $69.95 and the Ninja Professional Plus at $129.99 suit thicker purées — a vegetable dip or a mash. See the food processors page.
Prices quoted in this text were read on 2026-10-18. The live price is at the top of the page.
What readers want to know
Is it safe to blend hot soup in a countertop blender?
Only with precautions, because steam builds pressure under a sealed lid and can push it off. Let the soup cool for a few minutes, fill the jar no more than halfway, remove the small center cap and cover the opening with a folded towel, and start on the lowest speed. Your blender's manual has the final word: some jars are not rated for hot contents at all.
Can a food processor make a smooth sauce?
A purée, yes; a silky sauce, less well — a processor's S-blade chops rather than vortexes. The bigger limit is liquid: a processor bowl should not be filled past the blade with anything runny, or it weeps around the center shaft. The Hamilton Beach 12-cup is the only processor on this site with a sealed bowl for wet batches like soup base.
How do I get it smoother?
Cook the vegetables until truly soft, blend longer at a moderate speed, and strain if you want it silky. Skins and fibers are what make a sauce gritty, and more time does more than more watts. Add liquid a little at a time — it is easier to thin a sauce than to thicken it.
Last reviewed 18 October 2026