Seeded Irish Soda Bread from Gluten-Free Baking by Williams Sonoma

Ingredients

• 3 tablespoons gluten-free oat bran
• ¾ cup (6 fl oz/180 ml) plus 3 tablespoons whole milk, low-fat milk, or soy milk
• 1 cup (2¾ oz/80 g) gluten-free oat flour
• 2 tablespoons flaxseed meal
• ½ cup (2½ oz/75 g) potato starch
• ⅓ cup (1½ oz/45 g) shelled sunflower seeds or pumpkin seeds
• 1 large egg
• 1 teaspoon baking soda
• ¼ cup (2 oz/60 g) cold unsalted butter, cut into ½-inch (12-mm) pieces
• 1 teaspoon kosher salt
• 1½ teaspoons chia or poppy seeds (optional)
• 1½ teaspoons baking powder
• 2 teaspoons xanthan gum
• 1 tablespoon distilled white vinegar
• 2 tablespoons firmly packed brown sugar
• ½ cup (1¾ oz/50 g) sorghum flour, plus more for dusting