Rich and dark, chocolate cake is read as indulgence and comfort — the wish to be spoiled, or the pleasure you allow yourself when no one is looking.
When this appeared in your dream, what were you feeling?
My Cosmic Code has a private dream journal. Write a dream down and the app picks out the symbols in it, shows what dream books say about them and, over time, which words recur across your entries. The journal is stored on your device only.