Rigó Jancsi (ree-GO YAN-chee) is one of the classic late 19th-century Austria-Hungarian coffeehouse cakes, in the same historical category as Esterházy torta, Gerbeaud slice, and Dobos torta. Rigó, as we refer to it in the bakery, is a regal torte made with two light layers of chocolate sponge cake, filled with rum-flavored chocolate whipped cream, iced with a thin layer of apricot glaze, and finished with a dark chocolate ganache. It is a rich ch