Banana Chocolate Chip Muffins

In a large mixing bowl, combine the butter and the sugar.
Softening the butter slightly will make it easier to mix together with the sugar.
You can just use a tablespoon to do this, but an electric hand mixer will make life easier.
Peel the over ripe bananas and add them to the bowl with the butter and sugar.
Use a fork or electric hand mixer to mash the bananas.
It’s fine to have small lumps remaining in the mixture.
Add an egg to the mixture and combine well using a fork or electric hand mixer.
In a separate bowl combine the flour, cinnamon, bicarbonate of soda (baking soda), baking powder and salt.
Add the flour mixture to the wet ingredients and use a spoon or spatula to combine well.
You may want to sieve your flour mixture as you add it to your wet ingredients, to help remove any lumps.
Add 50g (1/4 cup) of chocolate chips to the mixture and stir well.
Line a 12 cup baking pan with either paper or reusable muffin cases.
Transfer the mixture into the cases.
I put 2 tablespoon scoops into each of the 12 cases.
Add some extra chocolate chips to the tops of the muffins (optional).
Place the baking pan into a preheated oven for 15-20 minutes at 180 °C / 350°F.
The muffins are ready when you can insert a toothpick into the centre of one and it comes out clean.