Simple Chocolate Yule Log Holiday Cake - SippitySup

Ingredients

• 1 cup Dutch process cocoa (divided, plus more for dusting)
• ½ cup boiling water
• 2 ¼ cup unsalted butter (at room temperature)
• ¼ cup sifted confectioners’ sugar
• ½ teaspoon kosher salt (divided)
• 1 ½ pound semisweet chocolate (melted and cooled )
• 4 large egg yolks
• 2/3 cup granulated sugar (divided)
• ½ cup flour
• 1 teaspoon baking powder
• ½ teaspoon ground cinnamon
• ½ teaspoon ground nutmeg
• 4 large egg white
• unknown sprinkles and chocolare curls (as garnish)