bottle Guinness Beer (reserve 2 tbls liquid for frosting) • unsalted butter, 12 Tbsp • bars Semi-sweet Chocolate, 226g, coarsely chopped • granulated sugar, 250g • Large Eggs • Vanilla Extract • AP Flour (spooned/125g leveled) • salt • Espresso Powder, optional • unsalted butter, room softened • confectioners' sugar, 240g • 2-3 tbl reduced Guinness from above •