mix oat bran in butter milk and set aside. Combine flour, baking soda, baking powder and salt in small bowl. In large bowl beat egg and add oil, sugar and vanilla. Blend in oat bran mixture. Add four mixture all at once and stir to moisten but do not over mix. Add blue berries. Pour into 12 cup muffin tin and bake for 20 minutes in 375 oven or until tops golden brown.