Bûche de Noël

Ingredients

• 1 cup all-purpose flour
• 1/3 cup Dutch cocoa
• ¼ teaspoon baking powder
• 1 tablespoon instant espresso powder
• ¼ teaspoon salt
• 2/3 cup milk
• 2 tablespoon unsalted butter, softened
• 3 eggs, at room temperature
• ¾ cup granulated sugar
• 1 teaspoon vanilla
• Confectioners’ sugar, for dusting
• ½ cup unsalted butter, softened
• ½ cup semi-sweet chocolate morsels
• 1 teaspoon instant espresso powder
• 4 ½ cups sifted confectioners’ sugar
• 4 to 5 tablespoons milk
• Dash of salt