CJane's 30 day bran muffins

I won't go into in this post how much I love CJane. I won't go into depth on how I look forward to her blog daily. How she makes me laugh. How her vlog is the one of my favorite parts of the week.
I truly think that if we lived closer, we'd be the best of friends. She'd bring her kids over and they'd play with mine, she'd gently chide me for my coffee habit (since Mormons generally don't drink coffee), and we'd go shopping for muu-muus.
But since we do live so far away, and since our friendship is basically just in my head, I have to settle for these muffins. These muffins which she touted are 30 day muffins because that is "how long the covered batter can last in your fridge without going gloopy, glopy, or sprinkled with blackish green bumps." And with that phrase alone simultaneously made me pee my pants and challenged me culinarily. Now, we're addicted to them. These muffins are good. They are chock full of good for you bran and fiber (we all need that). And they are totally mix-upable. Fridge sustainable. And I ziploc my-day olds. So that way when Little Man rolls out of bed (sometimes literally) and races to the kitchen and points to the oven-his way of saying 'muffin Ma' since he doesn't talk yet-I can just hand him a nice cool one.

30 Day Bran Muffins

4 cups All Bran cereal
2 cups boiling water
1 cup margarine
2 1/2 cups sugar
4 eggs
1 qt butermilk
5 teaspoons baking soda
1 teaspoon salt
5 cups flour
2 cups Bran Flakes

Pour boiling water over All Bran-set aside
Cream margarine and sugar.
Add eggs.
Alternate adding dry (flour, soda, salt) and wet (buttermilk), ending with wet.
Mix in Bran Flakes.
Bake at 400 for 15 minutes.

Now this is just a template...you can kinda do whatever you want to with these muffins. I've melted peanut butter and mixed that into the batter. I've used butter instead of margarine. My most recent batch was 1/2 butter 1/2 cream cheese, had partial usage of wheat flour, craisins and orange zest. Yum. It's also easy to cut the recipe in half.
How do you like your Bran muffins?