Although cibulačka originated from the famous French soupe à l'oignon, this Czech version has become one of the favorite soup varieties in the country. It is a simple and pungent dish consisting of caramelized onions cooked with a broth based on meat or vegetables.

It is usually served with crispy bread slices and a layer of grated cheese on top. Some Czech varieties incorporate potatoes, cream, or mushrooms, and occasionally thicken the broth with flour. This nutritious soup is mostly associated with the winter season, when it is commonly enjoyed as a satisfying starter.