For the Dough:
2¼ teaspoons (1 packet) active dry yeast
⅔ cup whole milk, warm to the touch
3¼ cups + 2 tablespoons all-purpose flour, divided
4 egg yolks
½ cup granulated sugar
⅓ cup apple cider
¼ cup unsalted butter, melted
1 tablespoon vanilla extract
1 teaspoon kosher salt
½ teaspoon ground cinnamon

For the Apples:
¼ cup unsalted butter
1 vanilla bean
7 Granny Smith apples, peeled, cored and chopped
¼ cup granulated sugar
½ teaspoon ground cinnamon
1 cup apple cider
¼ apple cider vinegar

For the Glaze:
½ cup + 2 tablespoons powdered sugar
¼ cup heavy cream
½ teaspoon vanilla extract
½ teaspoon kosher salt

2 quarts vegetable oil, for frying