Here are some secret sauce ways to impress.
Times, Sunday Times
An enigma, stuffed in a mystery, covered in a secret sauce.
Christianity Today
He added the secret sauce that made them irresistible: content and plenty of it.
Times, Sunday Times
Put the slider and cheese on top, followed by more secret sauce and a couple of sliced pickled cucumbers or gherkins.
Times, Sunday Times
He put the success down to his secret sauce recipe.
The Sun