Bakery-Style Sourdough Discard Blueberry Streusel Muffins
Towering, moist, lemon-scented blueberry sourdough discard muffins crowned with a buttery cinnamon-oat crumb streusel—using a 20-minute room-temperature batter rest and a 425°F initial oven blast to launch sky-high bakery domes without eggs.