Sourdough Boule Recipe | King Arthur Baking

Ingredients

• 1 cup (120g) malted wheat flakes or 1 cup (89g) rolled oats, old-fashioned or quick-cooking*
• 2/3 cup (152g) boiling water
• 1 cup (227g) ripe sourdough starter
• 3/4 cup to 3/4 cup plus 2 tablespoons (170g to 199g) water, lukewarm*
• 3 1/2 cups (420g) King Arthur Artisan Bread Flour or King Arthur Unbleached All-Purpose Flour
• 1/2 cup (71g) sunflower seeds, toasted until golden for best flavor
• 2 teaspoons (12g) table salt
• 1 1/2 teaspoons instant yeast
• 1 to 2 tablespoons (11 to 21g) whole flax seeds, [product-link]Artisan Bread Topping[/product-link], or seeds of your choice