01 - Combine milk, heavy cream, sugar, and vanilla bean seeds (or extract) in a blender container.
02 - Add ice cubes and blend on high speed until completely smooth and frothy with no remaining ice chunks.
03 - Taste the blended mixture and adjust sweetness or vanilla intensity to personal preference.
04 - Pour evenly into two tall glasses, filling nearly to the rim.
05 - Top with whipped cream and white chocolate shavings if desired. Serve immediately while cold and frosty.