Double-Chocolate Layer Cake Ingredients Cake 1 3/4 cups all-purpose flour, plus more for dusting 2 cups sugar 3/4 cup unsweetened cocoa powder 2 teaspoons baking soda 1 teaspoon baking powder 1 teaspoon kosher salt 1 cup buttermilk 1/2 cup vegetable oil 2 large eggs 1 teaspoon pure vanilla extract 1 cup freshly brewed hot coffee Frosting 6 ounces semisweet chocolate, coarsely chopped 2 sticks (1/2 pound) unsalted butter, at room temperature 1 large egg yolk 1 teaspoon pure vanilla extract 1 cup plus 1 tablespoon confectioners' sugar, sifted 1 tablespoon instant coffee granules Directions MAKE THE CAKE Preheat the oven to 350°. Butter two 8-inch round cake pans and line them with parchment paper; butter the paper. Dust the pans with flour, tapping out any excess. In the bowl of an electric mixer fitted with a paddle, mix the flour with the sugar, cocoa powder, baking soda, baking powder and salt at low speed. In a medium bowl, whisk the buttermilk with the oil, eggs and vanilla. Slowly... - WandaSue (lou)