Out of sour cream but I had a substitution

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While cooking the zucchini and yellow squash for the squash casserole I realized that I didn't have any sour cream. I reeeeeeeeeeeeeally didn't feel like going out to the store. I did a Google search for "sour cream substitute" and found that I could use either plain Greek yogurt or creme fraiche both of which I had. I decided to go with the creme fraiche because I didn't know what else I was going to do with it. Google is a wonderful thing.