01 - Preheat 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 cold butter into the flour mixture using a pastry cutter or fingertips until mixture resembles coarse crumbs.
04 - In a small bowl, whisk together milk, egg, and vanilla extract.
05 - Pour wet mixture into flour mixture. Gently mix until just combined. Do not overmix.
06 - Drop 6 equal portions of dough onto prepared baking sheet. Flatten each mound slightly with fingers.
07 - Bake for 15-18 minutes until golden brown. Let cool completely on baking sheet.
08 - While shortcakes bake, toss sliced strawberries with sugar and lemon juice. Let sit at least 15 minutes to macerate.
09 - In a chilled bowl, whip heavy cream with powdered sugar and vanilla until soft peaks form.
10 - Break each shortcake in half horizontally. Place bottom half in a cup, layer with strawberries and juices, add whipped cream, top with remaining shortcake half. Finish with additional strawberries and cream dollop.
11 - Serve immediately for best texture and flavor.