Dough:
•4 1/2 cups all-purpose flour, divided
•2 cups whole milk
•1/2 cup vegetable oil
•1/2 cup sugar
•2 1/4 teaspoon active dry yeast
•1/2 tablespoon salt
•1/2-2/3 teaspoon baking powder
•1/3-1/2 teaspoon baking soda

Filling:
•1 1/2 pints blueberries, divided
•1/2 cup sugar, plus 2 tablespoons
•1/2 cup water
•4 tablespoons cinnamon
•2 tablespoons flour
•1 tablespoon lemon juice
•2 teaspoons cornstarch