Joppie sauce

Joppie sauce also known as Joppe sauce or (Dutch) Joppiesaus is a condiment from the Netherlands based on mayonnaise with mild curry spices. It is commonly offered in fast food restaurants in the Netherlands and Belgium, but is also available in grocery stores.

Origin
Joppie sauce was created by Janyne de Jager of Annie's Snackbar in Glanerbrug, a village in the Netherlands on the border with Germany. It consists of mayonnaise with a 'secret blend' of spices. In 2002, the sauce entered industrial production by Elite Salades & Snacks, a company in Neede, who legally own the sauce's Dutch name Joppiesaus.

Ingredients and flavour
Joppie sauce is a vegetable oil-based mayonnaise with onion and curry powder spices. The flavour is akin to that of a mild curry mayonnaise and the colour is a vivid turmeric yellow. The sauce is commonly served with French fries and other deep-fried or fast food dishes.