secret sauce
[ see-krit saws ]
/ ˈsi krɪt ˈsɔs /
noun
a secret element, strategy, procedure, etc., that accounts for or increases the chances of success: The app's secret sauce is its simple interface.
Origin of secret sauce
from a so-called sauce for hamburgers whose ingredients are a closely held secret
Words nearby secret sauce
secret ballot,
secret history,
secret partner,
secret police,
secret santa,
secret sauce,
secret service,
secret society,
secreta,
secretagog,
secretagogue