Vanilla Bean Bourbon Milkshake

1/2 cup whole milk
1/2 fresh vanilla bean, split and seeds scraped (reserve pod for another use)
11 ounces premium vanilla ice cream (about 1 3/4 packed cups)
1 ounce (2 tablespoons) bourbon

Combine the milk, bourbon, and vanilla bean seeds in the blender and blend until combined, about 5 seconds. Add the ice cream and blend until smooth, about 10 seconds.