Chocolate Mousse Cake

Ingredients

• 3/4 cup (3 3/4 ounces) all-purpose flour
• 1/3 cup (3/4 ounce) cocoa powder
• 3/4 teaspoon baking soda
• 1/2 cup plus 2 tablespoons (about 4 1/3 ounces) packed light brown sugar
• 2/3 cup sour cream
• 1/3 cup vegetable oil
• 1 large egg
• 1 teaspoon instant espresso powder
• 2 teaspoons pure vanilla extract, divided
• 1/4 teaspoon salt
• 1/3 cup (2 1/3 ounces) granulated sugar
• 3 large egg yolks
• 2 3/4 cups plus 2 tablespoons heavy cream, cold, divided
• 20 ounces bittersweet chocolate, finely chopped, divided
• 4 ounces semi-sweet chocolate, finely chopped (see note)
• Confectioners’ sugar for dusting cake

Preparation

Click here for preparation method.