02Bake biscuits until toothpick inserted into centers comes out clean, about 15 minutes. Transfer to rack; cool. DO AHEAD Can be made 6 hours ahead. Let stand at room temperature.
03Stir strawberries, 6 tablespoons powdered sugar, and next 4 ingredients in medium bowl. Cover and chill at least 1 hour and up to 2 hours.
04Using electric mixer, beat chilled whipping cream, sour cream, and remaining 2 tablespoons powdered sugar until soft peaks form. Place 1 biscuit on each of 6 plates. Place large spoonful of berries with juices atop biscuits. Top with whipped cream. Pass remaining berries alongside.