01 - Preheat oven to 400°F and line a baking sheet with parchment paper.
02 - In a large bowl, whisk together flour, granulated sugar, baking powder, and salt.
03 - Cut in the cold butter using a pastry blender or fingertips until the mixture resembles coarse crumbs.
04 - In a separate bowl, whisk together milk, egg, and vanilla extract.
05 - Pour the wet mixture into the dry ingredients and gently mix until just combined, being careful not to overwork the dough.
06 - Turn the dough onto a lightly floured surface and pat into a 1-inch thick round. Cut out 6 rounds using a 3-inch heart-shaped or round cutter and place on the prepared baking sheet.
07 - Brush the tops with heavy cream and sprinkle with coarse sugar. Bake for 15 to 18 minutes, or until golden brown. Cool on a wire rack.
08 - While the shortcakes bake, combine sliced strawberries, granulated sugar, and lemon juice in a bowl. Let sit for at least 15 minutes to release juices and develop flavor.
09 - Beat cold heavy cream, powdered sugar, and vanilla extract with an electric mixer until soft peaks form.
10 - Split each cooled shortcake in half horizontally. Spoon macerated strawberries and juices onto the bottom half, top with whipped cream, and cover with the upper half. Garnish with additional whipped cream and fresh strawberries if desired.