"[4] The Arctic Circle chain still serves fry sauce in its western United States restaurants.

[5] In April 2018, Heinz announced the release of "Mayochup", a mixture of the two sauces,[6] because 500,000+ users voted "yes" in a Twitter poll asking Americans if they wanted to see it in stores.

According to tradition, the sauce was invented by Luis Federico Leloir, a Nobel laureate and restaurant patron, at a golf club in Mar del Plata, Argentina, during the mid-1920s.

[3][11][12] In France, many Turkish restaurants and fast food establishments serve fry sauce and call it sauce cocktail; it is also common for customers to request ketchup-mayo (a dab of mayonnaise and a dab of ketchup) alongside their French fries at such places.

[13][14] In Germany, a popular product called Rot Weiß (red white) is sold in toothpaste-style tubes; it consists of unmixed ketchup and mayonnaise, which form a red-and-white striped string when squeezed out.

Pommes-Soße or Frittensoße (fry sauce) is a lightly spiced mayonnaise similar to the Dutch Fritessaus.