01 - Combine sliced strawberries, sugar, and lemon juice in a mixing bowl. Toss gently and let stand at room temperature for at least 20 minutes, stirring occasionally.
02 - Preheat oven to 425°F. Line a baking sheet with parchment paper.
03 - Whisk flour, sugar, baking powder, and salt in a large bowl. Add cold butter and cut in with a pastry cutter or fingertips until mixture resembles coarse crumbs.
04 - Whisk milk, egg, and vanilla in a small bowl. Add to dry ingredients and stir just until a shaggy dough forms; do not overmix.
05 - Turn dough onto a lightly floured surface and pat into a 1-inch thick rectangle. Cut out 6 rounds using a 2.5-inch biscuit cutter, re-rolling scraps as needed.
06 - Place biscuits on prepared baking sheet. Brush tops with milk or cream for shine if desired.
07 - Bake 16–18 minutes until golden brown. Cool slightly on a wire rack.
08 - Beat heavy cream, powdered sugar, and vanilla in a chilled bowl until soft peaks form.
09 - Split warm biscuits in half. Spoon strawberries with juices over bottom halves, top with whipped cream, then biscuit tops. Add extra berries and cream if desired.