This may be a silly question but what do you do with all the egg yolks left over from making white cakes????????/
.....or you could just google 'egg yolk cakes/egg yolk recipes'
....or you can google 'egg yolk recipes'
Make a custard for the filling!
Feed them to the dog; Feed them to the garbage!.
Make 12 yolk cookies
Pastry cream and lemon curd.
orange curd, lime curd, flan
this site has tips on storing separate whites and yolks:
I've been buying the cartons of the Egg Whites Only in the dairy section above where the eggs are. The large carton contains about 20 egg whites in it. Saves me from having to figure out what to do with the left over yolks, plus I don't have to crack all those eggs and possibly ruin a white or two because the yolk got in it. I look at the nutrition label, see what the weight in grams is for one egg equivalent, then take that number times the number of eggs whites I need, then weigh it out into my measuring cup. So much easier than cracking eggs.