| | SYRUP |
| 1/3 | c | Water |
| 1/3 | c | Sugar |
| 1 1/2 | tb | Dark creme de cacao |
| 1/2 | ts | Vanilla extract |
| | GENOISE |
| | Nonstick vegetable oil spray |
| 3/4 | c | Plus 2 tablespoons cake flour |
| 1/3 | c | Plus 1 tablespoon unsweetened cocoa powder |
| 1/4 | ts | Baking soda |
| 5 | lg | Eggs |
| 1 | lg | Egg yolk |
| 3/4 | c | Plus 2 tablespoons sugar |
| 1/4 | ts | Salt |
| 1 1/2 | ts | Vanilla extract |
| 4 | tb | (1/2 stick) unsalted butter, melted, cooled |
| | GANACHE |
| 36 | oz | Bittersweet (not unsweetened) or semisweet chocolate, finely chopped |
| 2 1/2 | c | Whipping cream |
| 1/4 | c | Light corn syrup |
| 1 1/2 | ts | Peppermint extract |
| 1 | ts | Vanilla extract |
| | Chocolate curls (about 6 ounces) |
