In the United States , white chocolate must be at least 20 % cocoa butter , at least 14 % total milk solids , at least 3.5 % milk fat , and less than 55 % sugar or other sweeteners . Regulations also govern what may be marketed as `` white chocolate '' : In the United States , since 2004 , white chocolate must be ( by weight ) at least 20 % cocoa butter , 14 % total milk solids , and 3.5 % milk fat , and no more than 55 % sugar or other sweeteners .