Hmm, my traffic is 60% search engine and 40% social networks... why would I use my google acc? It is recipes, they are all the same and look same... they are on thousands of websites... ??? I think you didn't lost your account because you had recipe like 100 others...
I scrape recipes and then rewrite them.
Rewrite it , duplicate content is not good for adsense.What about recipes from ebooks which are not on web?
I am not sure how will it effect but you can always make small changes like cutting the onions 1st and mashing the potatoes later <-- This is just an example by making 3-4 changes every recipe you can make it somewhat unique. use unique images Mrbeatsontoast explained a really simple way of making a image unique (on his journey thread)
And what if I put credits? For example: recipe by Lisa Kudrow... Am I safe?