Sift the flour into a mixing bowl and add the butter/margarine. Rub the fat into the flour using a circular motion between the thumb and fingers. The mixture should begin to resemble breadcrumbs.
Sift in the icing sugar to ensure that there are no lumps and stir briefly to combine.
Add the beaten egg and work into the flour mixture using a fork. The mixture should begin to come together to form a soft dough.
Continue to bring the dough together using your hands. If there is a lot of flour left in the bowl, add a splash of milk (dairy or non-dairy), or water to help bring it together. Go very slowly and add only a very small amount of water and then work it into the dough. It is very easy to add too much.
If the dough is too wet, add a little more flour. Go cautiously, working the flour into the dough until it begins to come together.
Once you have a nice round, soft ball of dough, wrap it in clingfilm and pop it into the fridge for at least half an hour to rest before using.
Notes
Nutritional Information is computer generated and is intended as a guideline only.Storing this pastry: This pastry will keep for up to 3 days in a fridge as long as it is covered in cling film or stored in a suitable airtight container to prevent it from drying out.It will freeze for up to 2 months. Defrost thoroughly before use by leaving in the fridge the night before and using it the following day.