The phrase "hot cross" refers to a type of bun or bread that has a cross on top, made of icing or dough. It is usually eaten around Easter time. Full definition
Some recipes for hot cross buns suggest marking the cross before baking and filling it with a paste made from flour, water and shortening. (atreatsaffair.com)
This is an excellent recipe for hot cross buns. (epicurious.com)
I was a bit hesitant at making an «easy» version of hot cross buns but WOW they are great and the white paste beats all the pastry lays. (bbcgoodfood.com)