Preheat the oven to 425°F (220°C). Rookie mistake alert: don’t skip this; biscuits rise better in a hot oven.
Mix the dry ingredients. In a large bowl, whisk together flour, sugar, baking powder, and salt. Set aside.
Cut in the butter. Using a pastry cutter or your fingers, work the cold butter into the flour mixture until it resembles coarse crumbs. Don’t overmix; we’re not making glue.
Add milk and vanilla. Stir until the dough comes together, soft but not sticky. Use a light touch—you want fluffy biscuits, not hockey pucks.
Shape the biscuits. Turn the dough onto a floured surface, pat to about 1-inch thick, and use a round cutter to make 6–8 biscuits. Place them on a baking sheet lined with parchment paper.
Bake the biscuits. 12–15 minutes until golden brown. Let them cool slightly while you prep the berries and whipped cream.
Prep the raspberry filling. Toss raspberries with sugar and lemon juice. Set aside for 5–10 minutes so the berries get juicy and syrupy.
Whip the cream. In a chilled bowl, beat the heavy cream, powdered sugar, and vanilla until soft peaks form. Soft peaks, not stiff unless you like cloud bricks.
Assemble the shortcakes. Slice each biscuit in half horizontally. Spoon a generous layer of raspberry mixture on the bottom half, add a dollop of whipped cream, then crown with the top biscuit. Optional: add more cream or berries on top for show-off points.