Chocolate Cake with Malted Chocolate Ganache and Toasted Marshmallow Frosting

INGREDIENTS

• Nonstick cooking spray
• 1 cup (2 sticks) unsalted butter, room temperature
• 2 1/3 cups plus 3 tablespoons superfine sugar
• 1 1/4 cups extra-dark cocoa powder, sifted
• 2 large eggs, room temperature
• 1 large egg yolk
• 1 1/3 cup plus 4 teaspoons all-purpose flour
• 1 1/2 cup plus 4 teaspoons cake flour (not self-rising)
• 1 tablespoon plus 1/4 teaspoon coarse salt
• 2 1/4 teaspoons baking powder
• 2 teaspoons baking soda
• 2 cups boiling water
• 1/2 cup canola or sunflower oil
• Malted Chocolate Ganache
• Marshmallow Frosting