3 chocolate layer cake mocha frosting Recipes

cake flour, natural unsweetened cocoa powder, baking soda, salt, unsalted butter, room temperature, golden brown sugar, eggs, vanilla extract, buttermilk, instant espresso powder dissolved in 3/4 cup hot water, natural unsweetened cocoa powder, instant espresso powder, chilled heavy whipping cream, divided, sugar, chilled mascarpone cheese, bittersweet chocolate curls (optional)

cake flour, natural unsweetened cocoa powder, baking soda, salt, unsalted butter, room temperature, golden brown sugar, eggs, vanilla extract, buttermilk, instant espresso powder , dissolved in 3/4 cup hot water, natural unsweetened cocoa powder, instant espresso powder, chilled heavy whipping cream, divided, sugar, chilled mascarpone cheese, bittersweet chocolate curls (optional)