01 - Preheat the oven to 400°F. Line a baking sheet with parchment paper.
02 - In a large bowl, whisk together flour, sugar, baking powder, and salt until well combined.
03 - Cut in the cold butter using a pastry cutter or your fingertips until the mixture resembles coarse crumbs.
04 - In a small bowl, whisk milk, egg, and vanilla. Pour into the flour mixture and gently mix until just combined.
05 - Drop 6 equal portions of dough onto the prepared baking sheet. Slightly flatten each mound with your fingers.
06 - Bake for 15 to 18 minutes, or until golden brown. Let cool completely on the baking sheet.
07 - Toss sliced strawberries with sugar and lemon juice in a bowl. Let sit for at least 15 minutes to macerate and release juices.
08 - In a chilled bowl, whip the heavy cream with powdered sugar and vanilla until soft peaks form.
09 - Break each shortcake in half horizontally. Place the bottom half in a serving cup, spoon over strawberries and juices, add whipped cream, then top with the remaining shortcake half. Finish with additional strawberries and a dollop of whipped cream.
10 - Serve immediately for best texture and flavor.