Classic French Buche de Noel Recipe

Ingredients

• 4 large eggs, separated
• 1 cup granulated sugar
• 1/3 cup unsweetened cocoa powder
• 1/2 cup all-purpose flour
• 1/4 teaspoon salt
• 1/2 teaspoon vanilla extract
• 1 cup unsalted butter, softened
• 4 cups powdered sugar
• 1/2 cup unsweetened cocoa powder
• 1/4 cup heavy cream
• 1 teaspoon vanilla extract
• Powdered sugar for dusting
• Chocolate shavings or berries for garnish