A Bit of History
The driving forces in Baby Swiss evolving into a true "made in America" style cheese, were two Wisconsin cheese makers.
They were Eldore Hanni and Alfred Guggisberg, who were both of Swiss background (as can be seen by their names here).
Eldore was second generation Swiss, living in the heart of dairy country in Wisconsin, where much of the cheese making was of Swiss and German influence. Alfred moved to Pennsylvania from his home country- Switzerland.
Alfred Guggisberg was only 16 when he began to make cheese in the mountain pastures of Switzerland (the Alps). He furthered those skills at the famous Swiss cheese maker's institute before coming to the United States in 1947. Here, he settled in the Amish country of central Pennsylvania Doughty Valley in Charm, Ohio to work with the Amish farmers as a cheese maker.
By the 1960's, Alfred had developed a new style of cheese, which became the Baby Swiss cheese (1968). This was patterned after the Emmentaler of his homeland, but was much smaller and made with a richer milk. His focus in doing this was to develop a milder flavor for the American palate. Today, the Guggisberg cheese company is still thriving.
Eldore Hanni was a second-generation Swiss immigrant, who began making specialty cheese as a teenager (he managed a cheese factory at the age of 17). His strength was developing new recipes and in the early 1970's, Eldore began working on a recipe for Baby Swiss. Later in the 70's, he moved to the Amish area of central Pennsylvania to establish his new dairy and work with the milk of the Amish farmers. This eventually became Penn Cheese which flourishes to this day, although Eldore has retired.
There was a similar and parallel evolution for both men in developing this cheese. It resulted in a cheese with smaller holes and a creamier flavor from the use of full fat milk. It did not need to age as long and hence had a milder flavor.