Scratch Croissant Donuts Recipe by Tasty

Ingredients

• 1 cup cold water
• 1 large egg
• 3 ¾ cups bread flour, plus mor for dusting
• 1 ½ teaspoons kosher salt
• ¼ cup light brown sugar
• 1 tablespoon instant yeast
• 8 tablespoons unsalted butter, softened
• nonstick cooking spray, for greasing
• 18 tablespoons unsalted butter, chilled
• 2 qt vegetable oil
• 1 cup powdered sugar
• 1 vanilla bean, seeds scraped
• 1 tablespoon buttermilk