Chocolate chestnut cake - Astray Recipes

Ingredients

• 4 ounces Semisweet chocolate; coarsely chopped
• 2 ounces Unsweetened chocolate; coarsely chopped
• ¼ cup Plus 1 tablespoon Kirsch
• ¾ cup Canned unsweetened chestnut puree
• 4 large Eggs; separated (at room temp)
• 2 teaspoons Vanilla extract
• 6 tablespoons Unsalted butter; softened and cut into tablespoons
• ⅓ cup Sifted flour
• ⅛ teaspoon Salt
• ½ cup Sugar
• 6 ounces Semisweet chocolate; finely chopped
• ¾ cup Double (heavy) cream
• 2 tablespoons Light corn syrup
• 1 teaspoon Vanilla extract