Green Cake in dreams
Celebration — communal acknowledgement of an occasion.
How green changes the reading
Green colour adds growth and viability. The base meaning is still the meaning — green says it is alive, it is going somewhere, the conditions for it have begun to form.
The base reading of Cake
Cake in a dream is the dictionary's image of communal acknowledgement of an occasion. The cake is rarely just food; it is the dream's image of a moment being marked by people who care to mark it.
Where you often see it. A birthday cake. A wedding cake. A cake brought into a room of people. The dream uses cake when an occasion is being communally acknowledged.
What it is not. Cake is not indulgence in the moralised sense. The dream's cake is the social marker of acknowledgement.
Related in the dictionary. Read cake with wedding, party scenes, sugar, and any dream where the occasion is the point.