I'm not understand why it'd be "de crepes" and not "Des crepes"?
In this sentence, I don't think 'de' has anything to do with the word 'some' (as in, des / de la / du), but it roughly means 'for':
"Des recettes de crêpes" = Recipes for crepes / Crepe recipes
"Le panier de chien" = Basket for a dog / Dog basket
"La nourriture de bébé" = Food for a baby / Baby food
I discovered this here, under section 2: http://french.about.com/od/grammar/a/de-vs-du-de-la-des_4.htm
Incredible here the woman clearly pronounces crêpes. while the man who usually is very clear pronounces the last e. What is the correct way? Does the final e has to be pronounced?