I love Starbucks's mini vanilla scones, so much so that I set out to create my own copycat version. After many trials, I think I got it! Like the Starbucks version, these scones are sweet, buttery and vanilla-y, and have a light and tender texture. Full-fat sour cream is the key ingredient, so please do not substitute. To duplicate the Starbucks's version, I topped it with a simple powdered sugar glaze.