Deliciously Chewy, Nutty, Apple with Walnut Flapjack Ingredients 2 eating apples (unpeeled), cored, finely chopped 150g butter, softened, plus extra for greasing 150g light soft brown sugar 50g porridge oats 2 eggs 200g self-raising flour, sifted 50g walnuts, chopped Method Preheat the oven to 180°C, then grease the sides of a 9x12in baking tin with butter and line the base ...