|Place of origin||Netherlands|
|Serving temperature||With French fries|
Fritessaus or frietsaus ("fries sauce") is a Dutch accompaniment to French fries, served popularly nationwide. It is similar to mayonnaise, but with at most 25% fat, is leaner and usually sweeter than mayonnaise. Mayonnaise in the Netherlands is required by the Warenwet (Wares law) of 1998 to contain at least 70% fat and at least 5% egg yolk before it may be called mayonnaise.