This is a video about the egg tart, in Mandarin (and also in Wuhan dialect)! Interestingly enough they say the word in three languages. The second is in Mandarin: dàn tǎ, the last is a dialect in middle China.
dàn – egg.
This video (see at YouTube) is of beginner level difficulty. It has subtitles in English, Pinyin and Chinese characters.