To stack the cakes, hold a dowelling rod at the side of the 23cm/9in cake and mark with a pencil where the icing comes to. Cut the rod and three others to the same length. Push the rods into the ...

(15.25-ounce) box vanilla or white cake mix sparkling sparkling wine (such as champagne, prosecco or cava), at room temperature large eggs vegetable oil For the Champagne Buttercream: Tip: The cake ...