Mix in a large container and then cool:

2 c. old fashioned oats
2 c. crushed Wheaties
2 c. crushed bran cereal
2 c. boiling water
1/2 c. butter
1/2 c. shortening

Add to above mixture:

2 1/2 c. sugar
5 beaten eggs
3 c. whole wheat flour
2 c. unbleached white flour
1 tsp. salt
5 tsp. baking soda
1 qt. buttermilk
1 c. chopped nuts (optional)

Mix well. This batter will keep in your refrigerator for up to 6 weeks. Spoon into muffin liners until they're 1/2-3/4 full. Sprinkle cinnamon and sugar on top and bake at 400 degrees for about 20 minutes.