Fondue is a Swiss dish of dissolved cheddar served in a common pot (caquelon or fondue pot) over a convenient stove (réchaud) warmed with a flame or soul light, and eaten by dipping bread into the cheese using long-stemmed forks.
The earliest known recipe for cheese fondue as we known today originates from a 1699 book distributed in Zurich, under the name "Käss mit Wein zu kochen", "to cook cheddar in wine". It calls for ground or slice up cheese to be melted with wine, and to dipped bread in it.
Fondue was popularized as a Swiss national dish by the Swiss Cheese Union (Schweizerische Käseunion) in the 1930s as a method for expanding cheddar utilization. The Swiss Cheese Union additionally made pseudo-regional recipes as a major aspect of the spiritual defense of Switzerland".