Storage: The cake can be refrigerated for up to 2 days. Keep covered to prevent drying out.
Substitutions: You can use dark chocolate instead of bittersweet for a less bitter flavor. Fresh raspberries can be used instead of frozen, but ensure they are well-drained.
Tips: Ensure the water bath is hot before placing the cake in the oven to ensure even cooking. When making chocolate bands, work in a cool room to prevent the chocolate from melting too quickly.