At the end of Guangxu period of Qing Dynasty, there was a biscuit shop opened by Zhang on the right side of Futoumen Bell Tower in Wenzhou City. The "onion oil heavy crisp sesame cake" made by it is made by adding 8.5 kilograms of lard to every 5 kilograms of flour and kneading it into crisp noodles; The stuffing is made of salted pork fat diced meat, shrimp soaked in wine, sweet pickles, shredded Beijing and winter vegetables and chopped green onion, and mixed with sesame oil. After forming, it is baked with charcoal. The baked biscuits are light yellow and crisp. The female shopkeeper is a widow, but because she likes to wear white clothes, and her cooking is loved by people, many people call it the "White Empress" in Legend of the White Snake, and the baked biscuits are named after it.

White snake sesame seed cake is kneaded into crispy noodles with 8.5 kg lard per 5 kg flour; The stuffing is also very particular. Cut the pork fat into strips, marinate with salt for 3 days, and dice. Dice sweet pickles; Soak the shrimps in wine and cut into powder. Add sesame oil and mix well. Add cooked lard to flour and water, press it into a round skin, wrap it in bacon, sweet pickles, dried shrimps, onions, etc., and wrap it into a cake green body. Brush the cake surface with caramel water and sprinkle sesame seeds. When the temperature of the oven is raised to about 2℃, stick the biscuit green body on the oven wall, bake until the cake is light yellow, seal the oven mouth, and then braise and bake for about 5 minutes. The baked cake is light yellow in color, crisp at the entrance, crisp and fragrant.