and finally, it unintentionally happens when adding cold soymilk to hot coffee, which creates curdles and little tofu-y bits. (this can be avoided by putting the soymilk in the bottom of the mug and slowly adding the coffee to cook/acidify the soymilk slowly, which creates far smaller particles of tofu.)
see also tofuify
tofuify first appeared at vegsource by alextree August 29, 2002
tofuification first appeared in a post at livejournal's vegancooking community by postpunkjustin 2007-06-24
after all liquids are combined, you may add the dry ingredients and incorporate.