Chocolate Swiss Roll Cake (Regular & Mini)

INGREDIENTS

large eggs, separated

1/3 cup

granulated sugar

1/3 cup

packed light or dark brown sugar

1 tbsp

strong brewed coffee *or* 1 teaspoon espresso powder

1/4 cup

unsalted butter, melted

teaspoon pure vanilla extract

1/2 cup

all-purpose flour

1/4 cup

natural unsweetened cocoa powder, plus 2 Tablespoons (5g) for rolling*

1 tsp

baking powder

1/4 tsp

salt

1 cup

heavy cream or heavy whipping cream

3 tbsp

granulated sugar or confectioners' sugar

1 tsp

pure vanilla extract

optional: 2 Tablespoons marshmallow creme ("Fluff")

1/2 cup

heavy cream or heavy whipping cream

bar (113g) semi-sweet chocolate, finely chopped

optional for glossy shine: 1 teaspoon light corn syrup