My first is in chocolate riddle

My first is in chocolate 
But not in ham.
My second's in cake but also in jam.
My third at tea-time is easily found.
My whole is friend
Who is often around.
What am I?

Answer: Cat
Explanation: The first letter in chocolate and not in ham is "C". The second letter in cake and also in jam is "A". The third letter in tea-time is "A". Make all 3 letters "whole" you'll have CAT.