White dollop on a baked potato

• Borscht topping
• Topping on the freegan's menu?
• Taco topper, perhaps
• Dairy product eaten with quesadillas: 2 wds
• White onion-dip ingredient
• Baked potato topper, sometimes
• Chip flavoring
• Borscht go-with

Wiktionary Word definitions in Wiktionary
n. (alternative spelling of sour cream English)