This a delicious, not too sweet muffin, perfect for a quick breakfast or a snack. Try adding nuts instead of chocolate chips if you prefer!
Preheat oven to 350 degrees F.
In a medium sized mixing bowl, combine the beaten egg with milk, mashed banana, oil, sugar, and vanilla. Add the bran cereal and allow this to soften while you complete the next steps.
Measure the whole wheat flour, all purpose flour, baking powder, baking soda, salt and cinnamon into a large sieve or sifter.
Line a muffin tin with 12 paper muffin liners, and set aside.
Sift the dry ingredients into a large mixing bowl; add the chocolate chips, make a well in the centre, and pour the wet bran mixture into the middle of the well. Mix until just combined (do not over mix). Divide the batter into prepared muffin cups.
Bake for 18-20 minutes or until a toothpick inserted into the centre of the largest muffin comes out clean. Cool on wire racks. Store in sealed containers.