Preheat the oven to 400 degrees F. Line a large baking sheet with parchment paper or lightly butter if you don't have parchment.
In a large mixing bowl whisk together the flour, baking powder, baking soda, and salt.
Cut the butter into the dry ingredients using a pastry blender or two knives scissor fashion until the mixture resembles coarse crumbs. Add the cranberries and toss.
In a small bowl stir together the milk, sour cream and basil.
Make a well in the center of the flour mixture and add the milk mixture. Use a wooden spoon to stir just until the dough sticks together.
Dump the dough out onto a lightly floured surface, flour your hands and knead about 10 times or until dough holds together.
Pat or roll out the dough to ½-inch thickness. Cut with a 2" biscuit cutter and place on the baking sheet 2 inches apart. Brush the tops with half the melted butter.
Bake for 12 to 15 minutes or until golden brown around the edges and puffy. Brush the tops again with the remaining butter.