Name: Chocolate Swiss Roll Cake (Regular & Mini)
Prep time: 1 h
Cook time: 10 min
Total time: 3 h 40 min
Yield: 10-12 slices
Ingredients: 4 large eggs, separated; 1/3 cup (65g) granulated sugar; 1/3 cup (65g) packed light or dark brown sugar; 1 Tablespoon (15ml) strong brewed coffee *or* 1 teaspoon espresso powder; 1/4 cup (60g) unsalted butter, melted; 1 teaspoon pure vanilla extract; 1/2 cup (62g) all-purpose flour; 1/4 cup (20g) natural unsweetened cocoa powder, plus 2 Tablespoons (10g) for rolling*; 1 teaspoon baking powder; 1/4 teaspoon salt; 1 cup (240ml) cold heavy cream or heavy whipping cream; 3 Tablespoons (38g) granulated sugar or confectioners' sugar; 1 teaspoon pure vanilla extract; optional: 2 Tablespoons marshmallow creme ("Fluff"); 1/2 cup (120ml) heavy cream or heavy whipping cream; one 4 ounce bar (113g) semi-sweet chocolate, finely chopped; optional for glossy shine: 1 teaspoon light corn syrup