As an exception to most baking, make sure to use ingredients as cold as possible when making pastry: so cubed butter straight from the fridge and ice cold water. Keeping pastry cold helps avoid overworking the gluten and keep it relaxed to avoid shrinkage during baking.
Handle the pastry dough as little as possible throughout making. This is especially important when bringing it together, as overworking the gluten will lead to tough pastry.
Substitute the muscovado sugar in the apple pie filling for caster sugar or brown sugar if you wish. I love the molasses flavour, so this was my choice in this recipe!
Make sure the apple pie filling is completely cool before assembling the cookies. If it is still warm, it will melt the butter in the pastry and the whole cookie will loose its shape.
It is easiest to assemble the cookies on the prepared baking sheet as they can be difficult to transfer. If you still prefer assembling it in a separate space, use a flat spatula to support the pastry fully across the base of the cookie.
Leave the cookies to cool completely on the baking tray to ensure they have firmed up and will not collapse when moved.
If you are short on time, you can use frozen/shop bought pastry dough and shop bought apple pie filling. I will say though, all the different components are super easy to make and you will DEFINITELY taste the difference if you take the time to make each of these from scratch.