What's the white sauce in the hamburger?

The white sauce in hamburgers is salad dressing, and the raw materials of salad dressing are widely selected. All kinds of vegetables, fruits, seafood, eggs and meat can be used to make salads. Salad sauce is made by processing all kinds of thoroughly cooled clinker or edible raw materials into smaller shapes, adding seasonings or pouring various cold sauces or cold sauces.

Besides white salad dressing, there are yellow thousand island dressing, gray pepper mayonnaise and red ketchup. Generally speaking, the second layer of bread will be added with sauce.

Extended data:

The origin of hamburgers:

The name Hamburg comes from Hamburg, a city in northwest Germany. Today, Hamburg is the busiest port in Germany. /kloc-In the middle of the 0/9th century, people living there liked to mash steaks into certain shapes, which may have been spread to America by a large number of German immigrants at that time.

1836, a dish named "hamburger steak" appeared on the American menu; As can be seen from a cookbook 1902, the practice of hamburger steak at that time was very close to the concept today, that is, ground beef and onions were mixed with pepper.

In the late 20 th century, Americans improved the practice of hamburger steak, and then opened it to fast food restaurants, which is the origin of today's favorite hamburger.