Inner Mongolia Milk Skin Mooncake is a specialty mooncake originating from Inner Mongolia, China. It combines traditional dairy products of the Mongolian ethnic group with the cultural significance of the Mid-Autumn Festival. The key ingredient is "nai pi zi" (奶皮子), a type of dried milk skin or milk cheese, along with butter, cheese, flour, and sugar. This mooncake has a rich milky aroma and a smooth, sweet taste. Unlike traditional fillings like red bean or lotus seed paste, this version highlights the distinct flavors of the grasslands, making it a unique and increasingly popular choice for celebrating the Mid-Autumn Festival.