01 - Combine strawberries, sugar, and lemon juice in a medium bowl. Stir gently to coat. Cover and let macerate at room temperature for at least 20 minutes, allowing strawberries to release their juices.
02 - Preheat oven to 425°F. Line a baking sheet with parchment paper and set aside.
03 - In a large bowl, whisk together flour, baking powder, baking soda, salt, and sugar until well combined.
04 - Add cold cubed butter to the flour mixture. Use a pastry cutter or your fingers to work butter into the flour until mixture resembles coarse crumbs with some pea-sized pieces remaining.
05 - Pour buttermilk into the flour mixture and stir until just combined. Turn dough onto a lightly floured surface. Gently pat into a 1-inch thick rectangle. Fold dough in half and pat out again. Repeat this folding process twice to create flaky layers.
06 - Cut out 6 rounds using a 2.5-inch biscuit cutter, pressing straight down without twisting. Place biscuits on the prepared baking sheet. Brush tops lightly with additional buttermilk.
07 - Bake for 15 to 18 minutes until tops are golden brown. Transfer to a wire rack and let cool slightly.
08 - In a chilled bowl, beat heavy cream with powdered sugar and vanilla extract using an electric mixer or whisk until soft peaks form.
09 - Split biscuits in half horizontally. Place bottom halves on serving plates. Spoon macerated strawberries and their juices generously over each biscuit. Top with a generous dollop of whipped cream. Replace biscuit tops and serve immediately.