Just got back from Asda and noticed alot of normal items reduced in the baking aisle. This was one of them - Jane Asher's giant Yorkie chocolate cookie mix. Makes 6 mansize cookies with 5mins preparation time and 15 mins baking time. 370g box, just add water and butter.
Don't know if nationwide or not but like i said there were loads of other things on the shelf reduced in this aisle - we bought the last 4 of these in our local Asda.
Can't be bad for 38p and kids would love making (and eating) these! ;)