I teach a cooking class to my 8th graders at school, and we focus on healthy recipes. For their end of the year party, I made them a chocolate tofu pie. Only I just used cocoa powder instead of the chocolate chips, and I didn't use silken tofu- just extra firm in the blender.
I didn't tell them what it was made of.
They LOVED it!!
And then I told them.
And they STILL loved it.