Custard donuts are a type of pastry filled with a creamy custard filling. They are typically made from a sweet dough that is deep-fried until golden brown, resulting in a soft and fluffy texture. The custard filling is often flavored with vanilla, but variations may include chocolate or fruit flavors. These donuts are usually dusted with powdered sugar or glazed for added sweetness. Custard donuts are popular in many bakeries and are enjoyed as a delicious treat for breakfast or dessert. They can be found in various sizes and are often served warm for the best flavor experience.