The Ultimate Chocolate Cake — Robert St. John

Ingredients

• 1 ¾ cake flour
• ¾ cup cocoa (preferable Dutch processed)
• 2 teaspoons baking soda
• 1 teaspoon baking powder
• ½ teaspoon kosher salt
• 2 eggs
• 2 cups sugar
• ¾ cup melted butter
• 1 cup buttermilk
• 1 cup brewed coffee, at room temperature
• 1 teaspoon vanilla extract
• 1 1½ cups semisweet chocolate pieces
• 8 ounces cream cheese, softened
• ¾ cup powdered sugar
• 6 ounces unsweetened chocolate
• ½ cup unsalted butter, softened
• 4 cups powdered sugar
• 1 cup sour cream
• 1 Tbsp vanilla extract