Almonds

The almond is naturally bitter in taste and full of prussic acid. However occasionally a sweet almond is found. These mutations have been bred for us to enjoy. "If you think you can taste a hint of a prussic parable here, you're right. We're all connected by the gossamer web of shy pleasures and shared joy. The triumph of civilisation has always been to find the one sweet nut in the bag of bitter ones. And, boy, are we suffering a lot of bitter nuts at the moment.
PS: Most of the world's almonds are now grown America." (A. A. Gill - Table Talk)