In a blender, combine ice cream, vanilla bean seeds (or extract), and milk, and blend until pourable.
Pour into a glass, top with whipped cream if desired, and enjoy!
Notes
*Use 1/2 cup milk for a thicker shake, 3/4 for a thinner one.This will make approximately 1 1/2 to 1 3/4 cups, enough for one restaurant-sized shake or two smaller ones. Approximate nutritional information is for two milkshakes.