Only a high-power blender with a tamper does it well. A thick, dry load does not circulate in an ordinary blender jar — and a food processor is the better tool for peanut or almond butter.
Why it is hard in a blender
A thick, dry mass does not flow. The blade cuts a cavity, the contents above it stop moving, and the motor runs against nothing. A blender jar is tall and narrow precisely so that liquid vortexes down into the blade — and nut butter has no liquid until the very end.
What makes it possible
A tamper. On machines built for thick mixtures, a plunger through the lid pushes the paste back into the blade while it runs. Without one, you stop, scrape, restart — over and over, with a hot motor.
None of the blenders reviewed on this site publishes a tamper or names nut butter among its uses, and none of them is sold for a US outlet. That silence is the answer for those machines.
The better tool: a food processor
A food processor’s wide bowl keeps the nuts on the blade, and its lid comes off for a scrape in seconds. On this site:
- the Hamilton Beach 10-cup at $69.95, with a bowl scraper worked from outside the lid;
- the Ninja Professional Plus at $129.99, with a 1,000 W peak motor;
- the Cuisinart Mini-Prep Plus at $29.29, whose blunt blade edge is stated for grinding nuts — for a small batch only.
What happens if you push a motor anyway
Long runs under load, in a machine with no published duty cycle. Most makers publish power and none publishes how long the motor may run continuously. Run in bursts of a minute, rest a minute, and stop if the base gets hot or smells.
What to do in an ordinary blender
Small batches, with pulses, scraping down between them with the machine off and unplugged. Add a spoonful of neutral oil to get it moving. Accept a coarser result — a chunky spread rather than a smooth butter.
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
What is a tamper?
A shaped plunger that pushes contents into the blade through a hole in the lid, used on high-power blenders built for thick mixtures. Without one, a thick paste sits above the blade and the motor spins in an air pocket. None of the blenders reviewed on this site publishes one.
Is a food processor better for nut butter?
Usually, yes. The wide, flat bowl keeps the nuts on the S-blade, and you can stop and scrape the sides down. The Hamilton Beach 10-cup at $69.95 has a scraper worked without lifting the lid; its page advises a minute on and a minute off for a 450 W motor pushed through nut butter. The Ninja Professional Plus at $129.99 has a 1,000 W peak motor.
How long does it take?
Longer than it feels it should — often 8 to 15 minutes of processing for peanuts in a food processor, in stages: crumbs, then a dry paste, then a ball, then the oil releases and it turns smooth. Run it in bursts with rests, so the motor does not overheat.
Last reviewed 18 October 2026