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 with a pastry blender or your fingers until the mixture resembles coarse crumbs.
04 - In a separate bowl, whisk together milk, egg, and vanilla extract until smooth.
05 - Pour the wet ingredients into the dry ingredients. Mix gently until just combined; do not overmix.
06 - Scoop 6 equal mounds of dough onto the prepared baking sheet. Bake for 15-18 minutes until golden brown. Let cool completely.
07 - While shortcakes bake, combine strawberries, sugar, and lemon juice in a bowl. Toss to coat and set aside for at least 15 minutes to macerate.
08 - In a chilled bowl, whip the heavy cream, powdered sugar, and vanilla extract until soft peaks form.
09 - Crumble one shortcake into the bottom of each serving cup. Top with a layer of macerated strawberries, followed by a layer of whipped cream. Repeat layers as desired, finishing with whipped cream and a strawberry garnish.
10 - Serve immediately or refrigerate for up to 2 hours before serving.