Miracle Whip is a white salad dressing

Salad dressing spread

Salad dressing spread, often called salad dressing, is a condiment similar to mayonnaise. Unlike bottled salad dressings, salad dressing spread is not typically poured on salads but is spread on sandwiches. Salad dressing spread appeared during the Great Depression. The original appears to be...

 and sandwich

Sandwich

A sandwich is a food item, typically consisting of two or more slices of :bread with one or more fillings between them, or one slice of bread with a topping or toppings, commonly called an open sandwich. Sandwiches are a widely popular type of lunch food, typically taken to work or school, or...

 spread manufactured by Kraft Foods

Kraft Foods

Kraft Foods Inc. is an American confectionery, food and beverage conglomerate. It markets many brands in more than 170 countries. 12 of its brands annually earn more than $1 billion worldwide: Cadbury, Jacobs, Kraft, LU, Maxwell House, Milka, Nabisco, Oscar Mayer, Philadelphia, Trident, Tang...

, sold throughout the United States

United States

The United States of America is a federal constitutional republic comprising fifty states and a federal district...

 and Canada

Canada

Canada is a North American country consisting of ten provinces and three territories. Located in the northern part of the continent, it extends from the Atlantic Ocean in the east to the Pacific Ocean in the west, and northward into the Arctic Ocean...

. It is often used as an alternative to mayonnaise

Mayonnaise

Mayonnaise, , often abbreviated as mayo, is a sauce. It is a stable emulsion of oil, egg yolk and either vinegar or lemon juice, with many options for embellishment with other herbs and spices. Lecithin in the egg yolk is the emulsifier. Mayonnaise varies in color but is often white, cream, or pale...

 in recipes, although it is sweeter and has additional ingredients.
In 1933 Kraft developed a new dressing similar to mayonnaise, but as a less expensive alternative. Premiering at the Century of Progress

Century of Progress

A Century of Progress International Exposition was the name of a World's Fair held in Chicago from 1933 to 1934 to celebrate the city's centennial. The theme of the fair was technological innovation...

 World's Fair in Chicago

Chicago

Chicago is the largest city in the US state of Illinois. With nearly 2.7 million residents, it is the most populous city in the Midwestern United States and the third most populous in the US, after New York City and Los Angeles...

 in 1933, Miracle Whip was an instant success as a condiment on fruits, vegetables and salads.

According to Kraft archivist Becky Haglund Tousey, Kraft developed the product in-house using a patented "emulsifying

Emulsion

An emulsion is a mixture of two or more liquids that are normally immiscible . Emulsions are part of a more general class of two-phase systems of matter called colloids. Although the terms colloid and emulsion are sometimes used interchangeably, emulsion is used when both the dispersed and the...

 machine" (invented by Charles Chapman) to create a product blending mayonnaise products and less expensive salad dressing.