*Preheat the Oven:** - Preheat oven to 425°F (220°C). Line a baking sheet with parchment paper.

*Make the Dough:** - In a large bowl, combine flour, baking powder, and salt. - Add the cold butter and use a pastry cutter or your fingers to blend until the mixture resembles coarse crumbs. - Stir in the shredded white cheddar cheese.

*Add the Liquid:** - Add milk (and Dijon mustard if using) to the dry ingredients and mix until just combined. The dough will be sticky.

*Shape the Scones:** - Turn the dough onto a floured surface and gently knead it a few times. Pat it into a circle about 1 inch thick. - Use a knife to cut the dough into 8 wedges or use a round cutter for individual scones.

*Bake:** - Place scones on the prepared baking sheet. Brush the tops with a little milk. - Bake for 12-15 minutes or until golden brown.

*Serve:** - Serve warm with a little butter or enjoy as-is for a savory snack!