As a gift to some university friends to see them through the long long summer holiday without me, I gave them 'cake mix' (it was a phenomenon that really didn't exist where we lived, so what I did was measure out all the dry ingredients they needed to make the cakes that I cooked for them the rest of the year and seal them in Ziploc bags, with the 'additional ingredients' (butter and egg) written on the bag, along with how to cook it. Every single one of them was a science undergrad, but the thought of weighing things in the kitchen was beyond them!