A mooncake is a Chinese bakery product traditionally eaten during the Mid-Autumn Festival. The festival is for lunar appreciation and moon watching, when mooncakes are regarded as an indispensable delicacy. Mooncakes are offered between friends or on family gatherings while celebrating the festival.
Many types of fillings can be found in traditional mooncakes according to the region's culture:
Lotus seed paste (蓮蓉, lían róng): Considered by some to be the original and most luxurious mooncake filling, lotus paste filling is found in all types of mooncakes. White lotus paste commands an even higher premium. Due to the high price of lotus paste, white kidney bean paste is sometimes used as a filler.
Sweet bean paste (豆沙, dòu shā): A number of pastes are common fillings found in Chinese desserts. Although red bean paste, made from azuki beans, is the most common worldwide, there are regional and original preferences for bean paste made from mung beans, as well as black beans, known throughout history.
Jujube paste (棗泥, zǎo ní): A sweet paste is made from the ripe fruits of the jujube (date) plant. The paste is dark red in color, a little fruity/smoky in flavor, and slightly sour in taste. Depending on the quality of the paste, jujube paste may be confused with red bean paste, which is sometimes used as a filler.
Five kernels (五仁, wǔ rén) or mixed nuts: A filling consisting of 5 types of nuts and seeds, coarsely chopped, is held together with maltose syrup. Recipes differ from region to region, but commonly used nuts and seeds include: walnuts, pumpkin seeds, watermelon seeds, peanuts, sesame seeds, or almonds. In addition, the mixture will usually contain candied winter melon, jinhua ham, or pieces of rock sugar as additional flavoring.