01 - Preheat oven to 425°F. Line a baking sheet with parchment paper.
02 - In a large bowl, whisk together flour, sugar, baking powder, and salt. Add cold butter and use a pastry cutter or fingertips to blend until mixture resembles coarse crumbs.
03 - Stir in cold milk just until dough comes together. Do not overmix.
04 - Turn dough onto a lightly floured surface. Gently pat into a 1-inch thick rectangle. Cut into 6 rounds using a 2.5-inch biscuit cutter, reshaping scraps as needed.
05 - Place biscuits on the prepared baking sheet. Brush tops lightly with beaten egg.
06 - Bake for 15–18 minutes until golden and cooked through. Cool on a wire rack.
07 - While biscuits bake, combine strawberries, sugar, and lemon juice in a bowl. Let sit for at least 20 minutes to macerate and release juices.
08 - Beat heavy cream, powdered sugar, and vanilla with a mixer until soft peaks form.
09 - Split cooled biscuits in half. Spoon strawberries and juices over bottom halves. Dollop with whipped cream, then top with remaining biscuit halves. Serve immediately.