It would require much more than "cheaply": 1.It has to provide same nutrition.e.g. egg with B12 removed would not be equivalent to chicken egg. 2.It could be

It would require much more than "cheaply": 1.It has to provide same nutrition.e.g. egg with B12 removed would not be equivalent to chicken egg. 2.It could be privately produced like eggs. (As otherwise people depend on megacorporations abusing their mass production costs to monopolize the market) 3.It would need to have to compete with existing culinary preferences: i.e. recipes with eggs would not 'adapt to artificial eggs', with people continuing to use chicken eggs.