Skinny Banana Blueberry Muffins...Makes 15 muffins. Each muffin is 131 calories each based on using nonfat vanilla greek yogurt and unsweetened almond milk. Muffins taste best the next day, like most banana bread recipes. Muffins remain fresh and moist stored at room temperature for up to 5 days. Muffins freeze well, up to 3 months.