Get your oven heating to 425°F and line a baking sheet with parchment paper. This high heat creates steam quickly, which gives you those flaky layers.
Whisk together the flour, sugar, baking powder, and salt in a large bowl until evenly combined. No lumps of baking powder hiding anywhere — they'll create bitter pockets.
Add the cold butter cubes and work them into the flour using a pastry cutter or your fingertips. Stop when you have a mixture that looks like coarse meal dotted with pea-sized butter pieces — these butter bits will create steam pockets and flaky layers.
Create a well in the center of your flour mixture and pour in the cold buttermilk all at once. Using a fork, gently stir from the outside in until the dough just barely holds together. It should look shaggy and a bit rough — overmixing kills the tenderness.
Dump the dough onto a lightly floured surface and knead it gently just 2-3 times — enough to bring it together but not enough to develop gluten. Your hands should barely touch it.
Pat the dough into an 8-inch circle that's about ¾-inch thick. Use your palms, not a rolling pin — you want to keep those butter pieces intact for maximum flakiness.
Use a sharp knife or bench scraper to cut the circle into 8 equal wedges, like you're cutting a pizza. Clean cuts help the scones rise evenly without sealed edges.
Transfer each wedge to your prepared baking sheet, leaving about 2 inches between them. They'll puff as they bake and you don't want them sticking together.
Brush the tops with heavy cream — this gives you that beautiful golden color and helps any toppings stick if you want to add them later.
Bake until the tops and bottoms are golden brown and the scones feel set when you gently press the sides. They should sound slightly hollow when tapped.
⏱ 18 min
Let them rest on the baking sheet for 5 minutes — this brief cooling keeps them from falling apart when you move them, but they're still warm enough to melt butter.
⏱ 5 min