3 chocolate layer 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)

layer) package swiss chocolate cake mix, chocolate instant pudding mix, cola soft drink, vegetable oil, eggs, lightly beaten, mocha frosting, melted butter, baking cocoa, confectioners sugar, strong black coffee