Hi Marlene;
Here's the recipe I've used for about 30 years.
RAISIN BRAN MUFFINS
1- 15oz. box Raisin Bran Flakes
5 cups flour
3 cups sugar
5 tsp. soda
2 tsp. salt
Beat together:
4 eggs
1 qt. buttermilk
1 cup oil
Combine dry ingredients and add to the wet ingredients, mix well.
Best to let set 24 hours before using, stir well.
Fill muffin tins 2/3 full, bake at 400* for 15-20 minutes.
mixture will keep up to six weeks in fridge.