Any blender will work, but the trick is that you are making basically "whipped" mashed potatoes not "chunky" mashed potatoes, if the cauliflower is left chunky it will ruin the illusion. Also don't add extra milk like you do for potatoes. The first time I tried it I left the cauliflower chunky since I like home mashed potatoes w/ the little bit of "chunks", I hated it w/ the cauliflower and didn't try again for quite some time thinking these people were crazy if they thought it was like mashed potatoes but when it is blended to the point of being "whipped" or chunk free it is amazing.