Candy cap mushrooms have become a trendy food. These unusual little things taste exactly like maple syrup – to the point where the extract from them is put in cakes and ice cream. Chemists finally found out why, after over twenty-five years of research.
Source: Chemists Discover Why This Mushroom Tastes Like Maple Syrup
I wonder if the real reason it took so long (~25 years) is that like the Giant tortoise – they were eaten before they could be tested (youtube, 6:57 minutes).