bleu cheese dressing vs blue cheese dressing

bleu cheese dressing and blue cheese dressing both are nouns.

Word	Noun	Adjective	Verb	Adverb
bleu cheese dressing	Yes	No	No	No
blue cheese dressing	Yes	No	No	No

As nouns, bleu cheese dressing and blue cheese dressing are synonyms defined as:

bleu cheese dressing and blue cheese dressing: creamy dressing containing crumbled blue cheese

bleu cheese dressing (noun)	blue cheese dressing (noun)
creamy dressing containing crumbled blue cheese	creamy dressing containing crumbled blue cheese
	vinaigrette containing crumbled Roquefort or blue cheese