Made with purple sweet potatoes, also called the Japanese Purple Sweet Potato or Okinawan Sweet Potato, these mooncakes are not only pretty on the eyes, but they're also delicious, too! Chewy and fudgy on the outside and creamy and sweet on the inside, these mooncakes are naturally vegan, gluten-free and even paleo, thanks to the sweet potato filling that's used to replace lotus and sweet bean paste.