How long does homemade caesar dressing keep?
It is the same as mayonaise. The lemon/acid in the dressing essentially cooks the egg. It will last at least a week in the fridge - and really just goes "bad" when the oil turns. My mother kept mayo in THE PANTRY for months and we (5) survived.
All that being said, I throw out homemade mayo/ceaser after about a week.