Breakfast Six- Week Bran Muffins

This dough is great becasue it lasts 6 weeks in fridge. You only need to cook what you want for the next few days. 2.5 cups flour 2.5 tsp baking soda 1 tsp salt 1 tsp ground cinnamon 3 cups bran cereal flakes 1.5 cups sugar 2 eggs 1/2 cup canola oil 1/2 quart buttermilk 1 tsp vanilla makes 20 muffins