To get a smooth and equal batter, use room temperature components, especially eggs and butter.
To achieve a light and airy cake texture, beat egg whites separately to stiff peaks and gently fold in.
Choose high-quality bittersweet chocolate for a rich and authentic flavor.
Line and grease pans scrupulously to ensure the cake releases smoothly and without breaking.
A thin, uniform layer of slightly warmed apricot jam adds a faint fruity taste to the chocolate.