The Linzer cookie, thought to have originated in the city of Linz, is based on the Linzertorte, one of the most famous and beloved confections in Austria. The cookies are like mini versions of the torte, which consists of a buttery dough, rich with ground almonds or hazelnuts, spread with jam—usually raspberry or apricot these days, but originally with black or red currant jam or jelly—and then topped with a lattice of more dough before baking.