Love Food Hate Waste

Ingredients

• 2 banana peels, hard ends removed
• peel from 2 oranges (or other citrus fruit)
• 2 cups self-raising flour
• ½ teaspoon baking powder
• 1 cup sugar
• 1 teaspoon mixed spice
• ½ teaspoon cinnamon
• ½ cup walnuts, chopped
• 100g butter, melted
• 1 cup milk
• 1 egg lightly beaten
• 1 cup icing sugar
• a dash of vanilla essence or orange juice
• a drop of milk or water – just enough to make a spreadable consistency