Well butter a shallow baking tin (11 x 7 inches/28 x 18 cm). Then melt 4 oz (110 g) butter gently in a saucepan, without letting it colour, and mix the sugar andporridge oats evenly in a mixing bowl. Now pour the melted butter into the mixture, and mix until all the ingredients are well and truly blended together.

And all you have to do now is press this mixture all over the base of the baking tin and then bake in the oven for 15 minutes or until they’re a nice pale golden colour. Take the tin out of the oven, and cut the mixture into 12 portions – then leave in the tin until quite cold and crisp before removing them to an airtight tin (if you want to store them).