Chestnut Flour Chocolate Torte with Espresso Ganache | Chopped

Ingredients

• 1 1/4 cups chestnut flour
• 1/4 cup unsweetened cocoa powder
• 1 teaspoon baking powder
• 1/4 teaspoon fine sea salt
• 8 ounces bittersweet chocolate, chopped
• 3/4 cup unsalted butter, cubed
• 5 large eggs, separated
• 3/4 cup granulated sugar, divided
• 1 teaspoon vanilla extract
• 1/4 teaspoon cream of tartar
• 6 ounces dark chocolate, finely chopped
• 3/4 cup heavy cream
• 2 tablespoons espresso, freshly brewed and hot
• 1 tablespoon unsalted butter, softened