How you eat is how you live.
Let's eat well together.
Sign up for our useful and inspiring emails.
Get a $10 credit at Provisions,
our new kitchen-and-home shop, launching soon!
Well played.
You deserve a cookie.
We'll email your $10 promo code when we launch.
I find that fresh ricotta has to be used within three or four days of purchase to maintain that really fresh taste. I am completely guessing here that it is not yet bad enough to harm you, but if it smells a little sour, I don't use it anymore.
Could be you just have benign yeast and / or bacteria growing in there, but could also be something bad. Conditions that allow food spoilage bacteria to grow also allow nasty things to grow (the ones you can't smell or taste). Bottom line: "When in doubt, throw it out."