I have been making these muffins for many years. I just mixed up a batch for my daughter who is due to have a baby any day now. The beauty of this recipe is that you can keep the batter in a container for up to a month, so baking a half dozen muffins at a time is a breeze. I don't think my batter ever lasted a month, but probably 3 weeks and it still made good muffins. Kids like these, too, which isn't always the case with bran muffins. My one quibble with the recipe is that the bran flakes hide little bits of flour which can appear in the finished product. Not a deal breaker, just a slight annoyance. Stirring the batter more to remedy this could result in a tougher muffin so I just live with it.