Banana, Blueberry and Chocolate Muffins

I made these today as a take on the classic banana muffin. As is usual in my household, we had blueberries left over that weren't going to be used anytime soon, bananas that were very over-ripe and an abundance of chocolate, so this recipe seemed to make sense. It is one I've put together myself so I hope that you enjoy!

Banana, Blueberry and Chocolate Muffins
Ingredients:
2 ripe bananas
75g blueberries
50g milk chocolate chips
1 egg
1/3 cup caster sugar
1 tsp baking powder
1 tsp bicarbonate of soda                                                                        
1/2 tsp salt
1 1/2 cup plain flour
1/4 cup brown sugar

Method:

 Pre-heat your oven to 200 degrees C

1. Mash the bananas with a fork
2. Add to this the chocolate and blueberries
3. Now, gently stir in the caster sugar and the egg
4. Once combined, add the baking powder, bicarbonate of soda, salt and plain flour and mix, ensuring that you are not too vigorous when you do so
5. Spoon the mixture into a muffin tray lined with muffin cases, filling them 1/2 way
6. Sprinkle evenly about 1 tsp of brown sugar on the top (In total, for all muffins, this should equate to 1/4 cup)
7. Bake in the oven for 15-20 mins
8. Once cooked, leave to cool in the tray for 10 mins until removing
9. Store in a cool place