An egg tart is a popular pastry that features a flaky crust filled with a creamy custard made primarily from eggs, milk, and sugar. Originating from Portugal, it has become a beloved treat in many countries, especially in China and Hong Kong, where it is often enjoyed as a snack or dessert. The tart is typically baked until the custard is set and the top is slightly caramelized, giving it a rich flavor and smooth texture. Variations exist, including the Portuguese pastel de nata, which has a more pronounced caramelization, and different crust styles that can be found in various regions.