Measure all the dry ingredients into a large bowl. Add the cut butter to the dry ingredients and break it up using your fingers or a pastry cutter until the pieces are the size of chickpeas and green peas.
Pour in the cream and mix with a wooden spoon. When the mixture becomes too stiff to stir, use your hands to bring the dough together into a ragged ball.
If baking immediately, preheat the oven to 350°F.
Shape the dough into 12 equal-sized balls, approximately 2 ½" in diameter (about the size of a tennis ball), using your hands. Place them on a parchment-lined baking tray. Flatten the tops and bottoms to form tall hockey puck shapes.
Optional: The scones can be wrapped and frozen at this point. If continuing, lightly brush them with milk and sprinkle with sugar.
Bake on the center rack of the preheated oven for 30-40 minutes, or until golden brown and firm to the touch. Allow them to cool completely. You can also freeze the scones at this stage.