Cinnamon Twist Pastries

Bahan-bahan (18 porsi)

• One .25 ounce package active dry yeast
• ¼ cup warm water ((110° to 115°F))
• 1 cup warm buttermilk ((110° to 115°F))
• 4 tablespoons (½ stick) unsalted butter, (softened)
• 3 tablespoons granulated white sugar
• 1 large egg
• 1 teaspoon salt
• ¼ teaspoon baking soda
• 3¾ cups all purpose flour
• 2 tablespoons unsalted butter, (melted)
• ½ cup packed brown sugar
• ½ teaspoon ground cinnamon
• 1 cup powdered sugar
• 1 tablespoon unsalted butter, (melted)
• 1 tablespoon hot water ((or more, as needed, to thin out))
• ½ teaspoon vanilla extract