Keep the screen awake with cook mode on the Good Food app.
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Method
step 1
Sieve the flour into a bowl and then sieve in the icing sugar. Rub the cubes of butter into the flour and sugar until you end up with a crumbly mixture. Then mix in the lemon zest.
step 2
Add the eggs and milk to the mixture and gently work it together till you have a ball of dough. Flour a surface and place the dough on top. Pat it into a flat round, flour it lightly, wrap it in clingfilm and put it into the fridge to rest for at least half an hour.