Bran muffins pretend to be healthy: While filled with fiber, they're also usually filled with fat. In this updated version, our Test Kitchen trimmed the fat by making a velvety base of Greek yogurt, skim milk, maple syrup and a smidgen of grapeseed oil. Sweetness and texture come from antioxidant-rich goji berries and crunchy poppy seeds, while ginger, cinnamon and lemon zest make the muffins holiday-season appropriate. They're worth waking up for.