Sourdough Discard Blueberry Muffins - RedManShop

Ingredients

• Unsalted Butter — 8 tablespoons (113g)
• Dark Brown Sugar, Packed — 2/3 cup (142g)
• Granulated Sugar — 1/2 cup (99g)
• Ripe (Fed) Sourdough Starter — 1/2 cup (113g) or 1/2 cup plus 1 tablespoon (135g) sourdough discard
• Large Egg — 1
• King Arthur Pure Vanilla Extract — 2 teaspoons
• King Arthur Unbleached All-Purpose Flour — 1/2 cup plus 2 tablespoons (75g)
• King Arthur Unbleached Bread Flour — 3/4 cup (90g)
• Table Salt — 1/2 teaspoon
• Baking Powder — 1/2 teaspoon
• Baking Soda — 1/4 teaspoon
• Dark Chocolate, Chopped; Divided — 1 1/4 cups (213g)
• Milk Chocolate, Chopped; Divided — 1 1/4 cups (213g)
• Flaky Sea Salt, to Garnish; Optional — —
• King Arthur Unbleached All-Purpose Flour — 1 cup (120g)
• Yellow Cornmeal, preferably whole grain — 1 cup (138g)
• Table Salt — 3/4 teaspoon
• Baking Soda — 1 teaspoon
• Cinnamon — 1 1/2 teaspoons
• Sourdough Starter, unfed/discard* — 1 cup (227g)
• Milk — 1/4 cup (57g)
• Melted Butter or Vegetable Oil — 4 tablespoons (57g) or 1/4 cup (50g)
• Maple Syrup or Molasses, or Honey — 1/2 cup (156g) or 1/2 cup (170g)
• Blueberries, fresh or frozen — 2 cups (340g)
• Demerara Sugar or Coarse Sparkling Sugar, for sprinkling tops — —