01 - Preheat oven to 425°F. Line a baking sheet with parchment paper.
02 - In a large bowl, whisk together flour, sugar, baking powder, baking soda, and salt until well combined.
03 - Cut in cold butter using a pastry cutter or fingertips until the mixture resembles coarse crumbs with some pea-sized pieces remaining.
04 - Stir in buttermilk and vanilla just until combined; do not overmix. The dough will be slightly sticky.
05 - Drop 6 equal mounds onto the prepared baking sheet. Bake for 12–15 minutes until golden brown. Cool completely on a wire rack.
06 - Combine strawberries, sugar, and lemon juice in a bowl. Toss to coat and let sit for at least 10 minutes to macerate, allowing the berries to release their juices.
07 - Using a hand mixer, beat heavy cream, powdered sugar, and vanilla until soft peaks form. Do not overbeat.
08 - Break each shortcake into bite-sized chunks. Layer in serving cups: shortcake pieces, a generous spoonful of strawberries and their juices, then whipped cream. Repeat layers as desired, ending with whipped cream and a strawberry garnish.