Bran Muffins

This is a recipe from Doug's Gramma Campbell. I have to recognize Marybeth on this one because I am copying it out of her recipe collection!

1 C Butter
2 C Sugar
4 Eggs
5 tsp Baking Soda
3 C All-bran
2 C Bran Flakes
5 C Flour
1 Quart Buttermilk

Combine ingredients. Fill muffin tins 3/4 full. Bake at 425 degrees for 15 minutes. This is a HUGE recipe - you can keep it refrigerated for a few weeks. To substitute vinegar and milk for buttermilk put one Tbsp vinegar in measuring cup and fill to 1 Cup with milk to make 1 Cup of buttermilk. (4 cups = 1 quart). Substituting Great Grains cereal for the bran tastes great!