Pick over, hull, and slice strawberries. Crush a quarter of them to release juices, mix with sugar, and set aside.
Preheat the oven to 450°F (230°C).
Sift flour, 3 tablespoons sugar, salt, and baking powder into a large bowl. Rub in ¾ cup butter until crumbly. Add 1¼ cups cream to form a soft dough.
Knead dough for one minute, roll to ½-inch thickness, and cut into 3-inch rounds.
Grease a baking sheet and place half the rounds on it. Brush with melted butter, top with remaining rounds, and bake for 10-15 minutes until golden.
Remove from oven, split shortcakes, and brush insides with melted butter.
Beat remaining cream with vanilla until thick.
Assemble by placing a shortcake half on each plate, topping with cream and berries, covering with the other half, and adding more berries and cream.