Sourdough Blueberry Protein Muffins are the perfect fusion of tangy sourdough discard and juicy blueberries, boosted with protein for a wholesome treat. This same-day discard recipe transforms leftover starter into moist, flavorful muffins packed with natural sweetness and sustaining energy. Ready in under an hour, these muffins use everyday ingredients like flour, yogurt, eggs, and optional protein powder. They bake up golden with blueberries suspended throughout, offering a tender crumb and subtle sourdough tang. Ideal for breakfast, snacks, or holiday gatherings, this easy baking method proves that reducing waste can taste delicious.