3 chocolate espresso illustrated Recipes

strong black coffee, room temperature, instant espresso powder or 3 tbsp instant coffee, dark rum, divided (optional), egg yolks, sugar, table salt, mascarpone cheese, heavy cream (cold ), ladyfingers (42 to 60, depending on size), cocoa , preferably dutch-processed, semisweet chocolate (optional) or 1/4 cup bittersweet chocolate, grated (optional)

semisweet chocolate or 5 oz bittersweet chocolate, chopped, unsweetened chocolate, chopped, unsalted butter, cut into quarters, cocoa powder, instant espresso, eggs, sugar, vanilla extract, salt, unbleached all-purpose flour