Sour Cream, Yogurt Cream, and Labneh

Slathered on blintzes and onion-laced herring, spooned over strawberries, whisked into fruit soup— Jewish food can be extravagant with thick, luscious sour cream.

Delicious? Yes. Fattening? Absolutely. But real sour cream is a sensational splurge.

And there are alternatives.

You can substitute reduced-fat sour cream. But personally, I tend to stay away from most such products—either the taste itself is strange or the ingredients list contains too many weird, u