Hot cross buns are sweet and spiced, thanks to the addition of dried fruit (such as currants, raisins, or mixed peel) and spices like cinnamon, nutmeg, and allspice. They're also enriched with milk, butter, and sometimes egg (or vegan alternatives), giving them a soft, tender texture. The most defining feature, however, is the cross on top of each bun, traditionally made from a flour and water paste.