Preheat your oven to 200 degrees C and place the oven rack in the center of the oven. Butter or line a baking sheet with parchment paper.
In a large bowl, whisk together the flour, sugar, baking powder and salt. Cut the butter into the flour mixture with a pastry blender or two knives. The mixture should look like coarse crumbs. Gently stir in the cranberries making sure not to crush the berries. Add the milk and stir until just combined. Do not over mix.
Transfer to a lightly floured surface and knead the dough four or five times and then pat, or roll, the dough into a circle that is about 7 inches (18 cm) round. Cut this circle