Preheat oven to 425º.: As the oven warms, notice the subtle change in your kitchen air where anticipation meets warmth. Preheating ensures those first moments in the oven create rapid steam from the cold butter , helping the scones rise, and sets the stage for a golden crust. A common mistake is placing scones into an oven that is not fully hot, which can make them spread instead of lifting, so resist the urge to start too early.
Combine flour, baking powder, sugar, and salt in a mixing bowl. Whisk to combine.: When you whisk, listen for a soft whisper of the dry ingredients settling together, and watch the mixture take on a uniform pale tone. This even distribution of leavening and salt guarantees consistent rise and balance throughout each scone. Avoid skipping this step, because uneven leavening pockets will yield uneven texture where some scones rise more than others.
Cut in butter with a pastry blender until it looks like coarse cornmeal with a few slightly larger lumps. Gently stir in fruit.: As you work the cold butter into the dry mix, feel the grainy, coarse texture change under your tool. Those pea sized bits are perfect; they are the little pockets that steam and create flakiness. When you fold in the raspberries , do so softly so they stay intact and do not smear into the dough. A common error is overworking here, which warms the butter and yields dense scones.
Add heavy cream and stir with a spatula or fork till dough begins to form.: When the heavy cream hits the dry mix, it transforms into a shaggy dough that clings together in moist clusters. You should see patches of dry flour still, and that is okay, because continued handling will bring it together. The cream's fat contributes tenderness and flavor. Overmixing at this stage is a frequent pitfall, producing tough scones instead of flaky ones.
Pour out onto the countertop and knead very carefully till the dough comes together into a slightly sticky mound... only about 5-10 seconds.: Touch the dough and you should feel slight tackiness, not wet stickiness. Gentle kneading unites strands, but doing this too long tightens gluten and makes the crumb chewy. The right feel is a cohesive ball that still yields to a fingertip. Avoid heavy, pounding kneads, which are a foolproof route to dense scones.
Pat into a rectangle about 1 inch tall. Cut into 8-12 rounds using a biscuit cutter.: Patting the dough gently gives it uniform height which helps even baking. As you press, watch the edges form clean lines without compacting the center. When you press out rounds, you should hear a soft thud and see the dough separate cleanly. Forcing the cutter up and down repeatedly crushes layers, so press straight down and lift to leave the layers intact.
Place onto parchment or Silpat lined baking sheet. May brush with cream and sprinkle with sugar if desired.: Lining the sheet prevents sticking and encourages even bottom browning. Brushing with extra heavy cream before baking makes a shiny, golden top, and a sprinkle of sugar adds sparkle and crunch. Be mindful that too much brushing can create pooling, which can steam the bottoms and soften the crust.
Bake 11-14 minutes till light brown. Cool on a rack for 10 minutes before serving. May serve warm or at room temperature. These freeze well.: As they bake, pay attention to aroma and color, the kitchen will fill with a warm, toasty scent and the edges will gently brown. The sound is silent, but the visual cue of even, light browning signals doneness. Let them rest so steam redistributes, giving a tender crumb. A common trap is underbaking, which leaves a gummy center, so rely on color and a springy top to judge completion.
You may also make these in the food processor. Be careful not to over-process.: If you use a processor, the mixing is quick and the mixture should still show pea sized bits of fat. The noise is obvious and the dough comes together rapidly, but it is easy to overwork, turning the dough into a paste. Pulse briefly and check frequently to avoid warming the butter and losing flakiness.