1. Position your oven racks so that one is in the center, and preheat the oven to 400 degrees. Line a baking sheet with parchment paper.
2. Dump the dry ingredients into the bowl of the food processor fitted with a metal blade, and pulse to mix.
3. Add the butter to the bowl all at once, and run the food processor for 15 seconds. Switch to pulse, and continue pulsing until there are no chunks of butter left and the butter and flour are integrated into moist crumbs. Be careful not to mix the butter and flour until they form a dough or paste. Remove the blade from the food processor, and dump the crumbs into a big bowl.
4. In a separate, small bowl, whisk the eggs to break up the yolks. Whisk in the buttermilk, and use the whisk to stir in the cranberries.
5. Pour the wet ingredients into the bowl with flour-butter crumbs. Stir the dough with a wooden spoon until it just comes together and there is no trace of flour visible. You don’t want to work the dough a moment longer than necessary.
6. With a little bit of flour on your hands, scoop out a small handful (about ½ cup) of dough with your hand or a big spoon, and roll the dough until it forms a ball. Drop the dough onto your baking sheet, and press it into a 1-to-1½-inch-thick disk with the heel of one hand. Leave 2-inch spaces between the pressed disks.
7. Use a pastry brush or a scrunched-up paper towel to coat each scone with the egg wash. Sprinkle each scone with a thin layer of sugar.
8. Place the baking sheet on the center rack in the oven, and bake for 20–25 minutes, until the tops of scones are golden brown and a small knife or toothpick inserted into the center of one comes out clean.
9. Remove the baking sheet from the oven, and place it on a wire rack to allow the scones to cool for a few minutes. Lift the baking sheet off the rack, and use a metal spatula to transfer the scones from the baking sheet to the rack, or directly to the dish from which you’ll be serving the scones. Serve fresh out of the oven or at room temperature.