Salted Egg Sponge Cake, also known as Bông Lan Trứng Muối in Vietnamese, is a popular dessert in Vietnam. It is a type of sponge cake that incorporates the unique flavor of salted eggs.

Bông Lan Trứng Muối is made using a light and fluffy sponge cake base, which is traditionally made with eggs, flour, sugar, and a touch of baking powder. The distinctive element of this cake comes from the addition of salted egg yolks. The salted egg yolks are often mashed or processed into a paste and then incorporated into the cake batter. This gives the cake a rich and savory flavor that complements the sweetness of the sponge cake.