Preheat the oven to 180 degrees.Choose a tray with 12 shapes for muffins and grease them with butter.
Bake the walnuts for 8-10 minutes and chop them.
In a bowl mix the flour,sugar,baking powder,salt,cinnamon and walnuts.
In a medium bowl mix the crushed bananas,eggs,melted butter and vanilla essence.
Put the dough in the shapes of muffins and leave them in the oven for about 20-25 minutes. Allow them to cool for 5 minutes and then remove them from the shapes.
