Substitute guacamole for sour cream
Next time you go to use sour cream as a garnish or a dip consider using a home made guacamole instead. Though avocado does have higher fat content than most fruits/veggies, I’m perfectly cool with eating them as one of those “once and a while” foods.
Anyhow, it’s creamy and the taste is mild so it doesn’t overpower what you’re eating. Give it a shot.