Preheat your oven to 400 F (200 C) and line your baking tray with parchment paper.

Mix together the dry ingredients in a large bowl.

Add the cold butter and rub it into the flour until it resembles bread crumbs. It is important that your fingers and butter are as cold as possible.

In another bowl, mix the sourdough discard and milk until you have a smooth mixture and pour it into the flour.

Knead it into a rough dough and transfer the dough to a well floured work surface.

Roll out your dough or shape it into a 1-inch thick disk and cut out your scones.

Brush them with milk and place them on a lined oven tray.

Place your scones in the center of the oven and bake them for 20-25 minutes, or until golden.

Let them cool completely before serving.