the youngest in my family is very picky ever since he had an allergic reaction to some food.  Ever since then he won’t try much new ever, and is very picky.  To him, all he wants is the Kraft M&C and that’s it.  It is one of about 4 foods he eats.  So we keep it around for him even though my wife would prefer to make homemade.
 
He is so stubborn that he actually wont eat something he doesn’t trust  to the point that he is sick from low blood sugar.  Of course a trip to the emergency room in an ambulance at 20 months old probably sticks with you when your still just 3.