01 - Add milk, ice cubes, vanilla ice cream, vanilla bean seeds or extract, and sugar to blender.
02 - Blend on high speed until completely smooth and creamy, approximately 30-45 seconds.
03 - Taste mixture and add additional sugar if needed. Blend briefly for 10-15 seconds to incorporate.
04 - Pour evenly into two tall glasses. Top with whipped cream if desired and serve immediately with straws.