My Mom originally got this recipe from a friend years ago and it was then called ’30 Day Muffins’. Since we usually ate them immediately, I’m afraid I can’t vouch for what the results would be after 30 days. To be honest, I would be very surprised if they were still edible!
Depending on who filled the muffin pans though, we did occasionally have a couple of spoons of mix left after the first batch, sometimes enough for a muffin or two a few days later (although only if the mix was well hidden at the back of the fridge). The second batch of muffins still tasted good, even if they didn’t rise as much. The trick is to keep the raw mixture in the fridge and only bake the muffins when you want to eat them.
This recipe requires a bit of forward planning as the mixture needs to sit overnight so the bran softens and it all blends together. It’s really quick to put together the evening before though, and well worth the effort for the pleasure of fresh, delicious and fairly healthy muffins the next morning.