step 1
In a large mixing bowl, combine the plain flour, wholemeal flour, oats (or oats and coconut if using), brown sugar, baking powder, cinnamon and salt.
step 2
Create a well in the centre of the dry ingredients and add the mashed bananas, egg yolks, milk and sunflower oil. Mix together gently with a wooden spoon until a wet batter forms but do not overmix.
step 3
In a separate bowl whisk the egg whites until soft peaks form.
step 4
Gently fold the egg whites into the muffin batter along with the blueberries and any other additions you wish to include until everything is mixed through evenly.
step 5
Divide the muffin mixture between 12 individual muffin cases and place in a preheated oven at 200C/fan 180C/gas mark 6 for 25 minutes until well risen and golden brown ontop.
step 6
The muffins will keep for up to 4-5 days in a sealed tin or plastic container but preferably eaten on the day or day after baking for a fresher muffin. The muffins can also be frozen in a zipped plastic bag, thaw for 1 hour or until defrosted then pop in the oven for 10 minutes to reheat.