Snowflake Potatoes

In looking at menus from the 1930 and 1940 one of the consistent forms of potatoes served at a dinner were snowflake potatoes.  Now Snowflakes potatoes are not just white potatoes they are a form of mashed potatoes with sour cream and cream cheese added to them. According to the website What's on the menu.  http://menus.nypl.org/dishes/266169   snowflakes potatoes were on restaurant menus from 1928 to 1954.  So for some reason about the time common sense went out the door so did Snowflake potatoes.