There are many explanations about the origin of egg tart. One theory is that it originated from the Tudor dynasty in England and was invented by a black maid. Another said it was developed by Portugal for a group of nuns. Others say it was invented by Andriessen, an Englishman from Macau.

Egg tarts made in China and Macau are the best and most famous. Because the authentic Portuguese egg tart originated in Macao, and only the Marguerite egg tart in Macao can be regarded as a classic egg tart. Margaret, a native of Macau, is very talented in food. 1988, she baked egg tarts for guests with the secret recipe of Macao chef, which was very popular. Compared with ordinary egg tarts, the skin of Margaret egg tarts is more brittle.