
Don't prepare the apples ahead or they will discolour, and you don't want to soak them in water and lemon juice as you may do for a pie as that will make them too wet. As long as you work quickly and get the dough wrapped up in the cling film, they won't turn brown.
The chilling time is important - if you run out of time, I recommend leaving them in the fridge overnight before baking and be prepared to add an extra 2 minutes baking time to get the middles cooked (i.e. up to 16 minutes total).
These are moist cookies and they are best eaten within 24 hours of making. Or freeze them as soon as they are cold and thaw on some kitchen roll before refreshing in a moderate oven for 5 minutes to warm through and crispen up a little. The scent as they warm is also wonderful for cold autumn days!