Banana muffins with dark chocolate and walnuts

If your bananas have turned ripe to the extent that you don’t want to eat them, put them in a cake or these muffins! 

Banana muffins with dark chocolate and walnuts 
10 muffins

125 g sugar
125 g butter, softened 
2 eggs
125 g plain flour
1/2 tsp baking powder
2 bananas, very ripe
75 g dark chocolate (Guanaja 70% from Valrhona), chopped
75 g walnuts, chopped

Butter a 6 hole muffin pan (or put paper muffin cups in the pan). Whisk to combine sugar and butter in a bowl. Add the eggs one at a time while whisking. Fold in the flour and baking powder. Mash the bananas and add them to the batter together with the chocolate and walnuts and stir to combine. Bake in the muffin pan for about 20 minutes at 180 degrees celcius. Cool down.