Vac cake is basically a dumpling comprising of two small 2-inch diameter rounds of rice paper, with a dime-sized lump of meat filling right in the center.
When the rice paper is steamed, the edges get soft and chewy and warp a little, making the dumpling look like a white flower.
They are presented about 15 on a plate, topped with crunchy bits of toasty garlic and served with a sweet dipping sauce.
When prepared well the texture is soft but slightly chewy, sweet from the sauce and crunchy/salty from the toasted garlic, savory from the shrimp meat filling.
The translucence of the flour along with the color of the shrimp meat gives it the appearance of a white rose petal.