The phrase comes from Daisy sour cream advertising in the United States, where 'do a dollop of Daisy' became a familiar tagline for adding sour cream to everyday meals. Its sing-song, wholesome delivery made it easy to remember and easy to quote, and the line has since been clipped and reused far beyond its original commercials. Food creators now drop it into recipe videos and parodies because it instantly signals a creamy finishing touch, while meme editors use its earnest, old-school ad tone as a gentle punchline.