Preheat oven to 180c/Gas Mark 4. Grease your chosen tin with butter.
Sift the flour into a bowl and rub in the butter until the mixture looks like breadcrumbs.
Stir in the icing sugar and egg yolk and add the milk until a soft dough is formed.
Put the dough on a floured surface and knead gently until smooth.
Make the dough into a ball and roll out to 1cm thick.
Cut circles from the dough using a round cutter and press lightly into the holes of your tin.
Put a large spoonful of mincemeat in each pastry case leaving room for it to expand when cooking.
Cut star shapes from the leftover dough and place on top.
Brush the tops of the mince pies with milk and sprinkle with sugar.
Bake for approx 15 minutes or until browned.