Starch is another contender, though we are not sure about the receptor for that one.
It's a difficult taste to describe, but it's almost like chili that's "cold"/"icy" instead of "hot"/"burning".
[0] https://en.wikipedia.org/wiki/Kung_Pao_chicken
Thank you for the reference.
[1] https://www.amazon.com/Huang-Spicy-Crispy-Peanut-Ounce/dp/B0...
Starch is another contender, though we are not sure about the receptor for that one.