01 - Combine milk, heavy cream, sugar, and vanilla bean seeds (or vanilla extract) in blender. Blend on high speed until fully incorporated.
02 - Add ice cubes to blender. Blend on high speed until mixture reaches smooth, frothy consistency with no remaining ice chunks.
03 - Taste frappuccino and adjust sweetness or vanilla intensity as needed. Blend briefly to incorporate any additions.
04 - Pour blended beverage evenly into two tall glasses. Top with whipped cream and white chocolate shavings if desired. Serve immediately while frosty.