Ever heard of a Szechuan button?

The edible flower buds of acmella oleracea, also called "tooth-ache plant"—feel like an ingredient straight out of Willy Wonka's laboratory. Biting into one is an experiment with the unknown, a sensory experience that goes beyond just taste. Also known as buzz buttons, electric buttons, and electric daisies, the buds have a grassy, slightly sour flavor that’s accompanied by a pleasant tingling sensation, almost like eating a handful of Pop Rocks. The effervescent, Champagne-like zing takes over slowly, dancing around the top of the tongue before giving way to a surprisingly welcome numbing, cooling effect.