Derivative Sauce

A derivative sauce is a sauce developed from one of the classical mother sauces by adding ingredients, flavourings, reductions or enrichments. In French classical cuisine, derivative sauces are also called small sauces or petites sauces. They allow a basic sauce to be adapted to a particular dish.

Examples from the mother sauces

• Béchamel: Mornay is made by enriching béchamel with cheese.
• Velouté: sauce suprême is traditionally made by finishing a poultry velouté with cream; other derivatives use reductions and additional flavourings.
• Espagnole: demi-glace is a classical derivative or reduction associated with brown sauce; Bordelaise adds red wine and other ingredients to a brown sauce base.
• Hollandaise: Béarnaise is a related emulsified butter sauce flavoured with a tarragon and shallot reduction.
• Tomato: derivatives may be developed with herbs, vegetables, stock or other flavourings.

Why derivative sauces matter

They provide a structured way to build a sauce repertoire from a smaller number of foundational preparations. The base sauce contributes body and technique, while the added ingredients create a distinct flavour profile.

Chef’s tip: Understand the base sauce and its consistency before adding the derivative ingredients. Adjust seasoning and acidity at the end, and do not assume every modern sauce fits neatly into the classical system.

Key distinction: A derivative sauce is based on a foundational sauce; a finishing sauce may be created independently and does not necessarily derive from a mother sauce.