
1 cup unsalted butter, softened
10 cups powdered sugar
2 cups sour cream
2½ teaspoons pure vanilla extract
3 oz. white chocolate, melted and cooled
3 oz. milk chocolate, melted and cooled
3 oz. semisweet chocolate (60% cacao), melted and cooled
3 oz. unsweetened baking chocolate (100% cacao), melted and cooled