Final answer:
The question about the number of crab cakes served and the type of butter cannot be answered without specific restaurant details as it pertains to a menu item and does not align with academic subjects.
Step-by-step explanation:
The question "How many crab cakes are served on the appetizer? What type of butter is it served with?" seems to be related to a specific restaurant menu item, which does not fall under the usual academic subjects. Therefore, details such as the number of crab cakes on an appetizer and the type of butter served with them would vary from one establishment to another and cannot be accurately provided without specific information about the restaurant in question. As this is not an academic question, I am unable to provide an answer that would be relevant to typical school subjects. Please provide additional context or clarify if this is related to a broader educational topic.