So interesting to follow the chain unintended consequences. Trans fats make great muffins. But, oops, they happen to kill humans. So we ban them. Turns out palm oil also makes great muffins and doesn't kill humans. So, we burn down the ecosystem in Indonesia to make more of those delicious muffins and contribute to global warming. Maybe we can just go back to using butter?
Except that cows are pretty environmentally-unfriendly too. Sigh. There is no getting around the elephant in the living room: population. Either we control it, or the laws of physics will do it for us.
I expect food production to see a huge revolution in 10-20 years - think something like genetically modified simple organisms that are designed to produce specific nutrients - like specific protein or sugar or fat.
If you can design them to be energy efficient and work in low amount of space in a controlled environment (say a shallow pool of water + UV lamps or something like that) you can have huge factories that stack these "ponds" on top of each other working 24/7 pumping out nutrients.
Then it's just a matter of combining them in to food.