Start by making the pastry by creaming the sugar and butter.
Add the buttermilk and beat well until light and creamy.
Sift in the flour, baking powder and salt.
Knead lightly to form a soft dough. Place in the fridge or freezer for about 10 minutes.
Preheat the oven to 350°F/180°C (160°C fan)
Roll out the pastry to ( ¼ inch) 4mm thick. Using a round cutter , cut out and place them into greased or sprayed tart or muffin pans
Put 1 teaspoon fruit mince mixture into each.
Re-roll out the pastry to cut out covers and press them on top to seal.
Brush tops with milk.
Bake mince pies for 10-15 mins until golden brown.
Remove from tray and place on cooling rack.
Dust with sifted powdered sugar.
Store for up to 3 days in an airtight container.