Can my Blender be Considered Parve if I Used it to Blend Meat? 

435. Can my Blender be Considered Parve if I Used it to Blend Meat? 

One may use the same blender or food processor that was used for processing meat to blend parve food; the food remains parve and may even be eaten together with milchigs. However, it’s only permissible if:

  • only cold meat was placed in the blender;  
  • the blender was not washed with hot water if any meat residue was left on it;
  • no sharp food, such as onion or garlic, was placed in the blender together with the meat; and
  • it was ascertained that the blender was clean of all fleishig residue before using it to blend parve food. 

According to some poskim

  • if sharp food, such as onion or garlic, which had been cut with a fleishige knife, was processed in the blender, the blender becomes fleishig
  • if hot meat was processed in the blender, and one wishes to use it afterwards to blend cold parve food—and eat it with milchigs—one may do so only if they have no other blender. However, this should not be done regularly.

It should be noted that there are studies that have shown that some blenders and food processors produce heat, and some argue that these blenders may actually reach a temperature higher than yad soledes bo (the level of heat which is deemed significant according to halachah); in such a case it would be considered as if the meat was actually cooked in that blender. The halachah is then the same as it is for parve food that was cooked in a fleishige pot.  #435

https://halacha2go.com?number=435

Practical Halacha: One minute a day. By Horav Yosef Yeshaya Braun, shlita, Mara D'asra and member of the Badatz of Crown Heights.