Consejos y Secretos de la Cocina Latina
(Advice and Secrets From the Latin Kitchen)
The South American Table, page 404
#1. To enhance the flavor of foods, add a pinch of salt to sweets and a pinch of sugar to savory foods.
Good Idea: adding a pinch of of chocolate to a batch of chili con carne.
Bad Idea: adding a pinch of ground chipotle pepper to brownie batter.