Grease or line with parchment paper two baking sheets.
In the bowl of a food processor, put 2 ¼ cups all-purpose flour, ⅓ cup sugar, 1 tablespoon baking powder and ⅛ teaspoon salt. Process for a few seconds, just to mix.
Scatter 6 ounces unsalted butter over this mixture and pulse a few times until the butter is the size of peas. If making by hand use a large bowl and cut the butter with your hands or a pastry cutter. Then follow the recipe below.
Transfer the mixture to a large bowl. Pour ¼ cup whole milk and ½ cup heavy or heavy whipping cream and stir quickly with a fork, mixing everything until most of it is moistened.
Dump it onto the kitchen counter and quickly give it a few turns to avoid very dry spots. Some dry parts will remain and that is OK. The more you touch it and mix it, the tougher the baked scones will be.
Pat the mixture about 1 to 1.5-inches high.
With a round, small cookie cutter cut scones (you might need to dip the cutter periodically in flour to aid with this) quickly and arrange them on the baking sheets.
Brush the tops lightly with additional cream and sprinkle with sugar.
Bake for about 20 minutes, until they're puffed, the tops are golden and the insides are fully baked. If in doubt, lift one with a fork and check that the crumb is dry and not still wet.
Eat warm. Store leftovers in a tin or airtight container and warm briefly in the oven before eating.
Notes
Baking powder: it's essential for them to rise, so make sure it's not expired.Very cold ingredients: Butter, cream, and milk belong in the fridge until you need to scatter and pour them.Don't work the dough much. It should come together but still have floury patches. You don’t need to work it until it’s smooth, like pie dough, for instance. It is uneven, with dry spots sometimes, and that’s good for flakiness later.Freezing scones: cut them and put them on a baking sheet. Freeze until solid and transfer to a freezer-safe container or bag for two months (so you liberate the tray and have more space in the freezer). When ready to bake, take as many as you want and bake directly as instructed in the recipe card below.Citrus variation: add some lemon or orange zest to the dough before adding the liquid.