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. Cut in the cold butter with a pastry blender or fingers until the mixture resembles coarse crumbs.
03 - In a separate bowl, whisk together milk, egg, and vanilla. Pour into the dry ingredients and mix gently until just combined.
04 - Scoop 6 equal mounds of dough onto the prepared baking sheet. Bake for 15 to 18 minutes, until golden. Let cool completely.
05 - While the shortcakes bake, combine strawberries, sugar, and lemon juice in a bowl. Toss and set aside for at least 15 minutes to macerate.
06 - In a chilled bowl, whip the cream, powdered sugar, and vanilla until soft peaks form.
07 - To assemble, crumble one shortcake into the bottom of each cup. Top with a layer of strawberries and then a layer of whipped cream. Repeat layers as desired, finishing with whipped cream and a strawberry garnish.
08 - Serve immediately or refrigerate for up to 2 hours.