For a more intense chocolate flavor, use dark chocolate with a higher percentage of cacao. Ensure the buttermilk and eggs are at room temperature for better emulsification and a smoother batter. When making the ganache, be careful not to overheat the cream, as this can cause the chocolate to seize. For a neater finish, trim the cake layers with a serrated knife before assembling. Garnish with chocolate shavings, fresh berries, or a dusting of cocoa powder for an elegant presentation.