Are milk shakes made of soy?

Milk shakes are typically made with dairy milk, ice cream, and flavorings such as chocolate syrup, fruit, or malt powder. Soy milk can be used as a substitute for dairy milk in milk shakes, but it is not a traditional ingredient. Soy milk is made from soybeans that have been soaked, ground, and filtered. It has a similar consistency to dairy milk, but it contains less protein and fat. Soy milk also has a slightly different flavor than dairy milk.