01 - Combine milk, heavy cream, sugar, and vanilla bean seeds in a blender container.
02 - Add ice cubes and blend on high speed until completely smooth and frothy, approximately 45-60 seconds.
03 - Taste the blended mixture and adjust sweetness or vanilla intensity to personal preference.
04 - Pour the frappuccino evenly into two tall glasses, filling to within 1/2 inch of the rim.
05 - Top with whipped cream and white chocolate shavings if desired. Serve immediately while frosty and cold.