Comment by VoidWarranty
9 hours ago
Superstition/caution.
They aren't 'difficult' to cook. They are dangerous to eat if uncooked (and thus undercooked).
While true morels themselves can be dangerous while uncooked, there are similar looking species that are both less and more dangerous.
Species of Gyromitra or "false morels" like Verpa Bohemica will commonly all be called "morels": both as an intentional cultural colloquialism or simple misidentification.
Depending on which hemisphere you live in, some Gyromitra species may be more dangerous than true morels. They can also be more dense and harder to cook thoroughly.
Most mushroom species will cause an upset stomach if undercooked. Drying is an effective way of reducing both dangerous and uncomfortable compounds. It's suggested for morels out of an abundance of caution, but it is not a necessary step.
(Note that not all compounds are destroyed! "Magic mushrooms" are famously traded dry for example!)
The advise to add an additional preparation step also increases the chance someone will notice the wrong species hiding in their ingredients. Undesirable species can have overlapping habitats and climates so its not uncommon for a careless or ignorant forager to pick the wrong thing.
> some Gyromitra species may be more dangerous than true morels.
People have died from eating them; they contain a powerful liver poison. Even claiming they are 'called "morels"' is ridiculous and irresponsible.
> Note that not all compounds are destroyed!
Mushrooms, like all matter, is made of "compounds". Dehydration is typically used to remove the dreaded dihydrogen monoxide!
Despite many people such as you and I yelling at random hippies and hillbillies online, they continue to call everything "morels". Reread my comment again: it is true that people colloquially misname dangerous species. I cannot help this. I can only point this fact out.