Tartar sauce is a mayonnaise or aioli-based sauce, typically used as a dip or a condiment. It is often used as a dip for fried seafood, such as fish and chips. The sauce is also popular on sandwiches, particularly in the United Kingdom. The sauce is made from pickled cucumbers, capers, onions, and gherkins, combined with mayonnaise or aioli.
The origin of tartar sauce is unknown, but it is thought to have originated in France. The sauce was introduced to the United Kingdom by the French chef Auguste Escoffier.
Big Boy Tartar Sauce is a brand of tartar sauce that is produced by the H.J. Heinz Company. The sauce is sold in the United States, Canada, and the United Kingdom.