Preheat oven to 425 F. Mix first 4 ingredients. Add baking soda, cinnamon and flour . Add Bran last. Pour into plastic bowl with airtight cover. Bowl must be larger than batter as batter expands. Keep in fridge for 2 days before using. Can be kept for 6 weeks in fridge and used as needed. -Fill cups almost full. Heat oven to 425 degrees. Turn down to 375 and bake at 375 degrees for 20-25 minutes until toothpick comes out clean.