Preheat oven to 425°F
Prepare and cut the strawberries into a medium bowl.
Pour the sugar over and toss the strawberries so all are evenly covered. Place into the fridge to macerate.
In a large bowl put the flour, cornstarch, baking powder, baking soda, salt and sugar together and mix until combined.
Cube the cold butter and add to the flour mix.
With a food processor, pastry cutter or simply your hands cut in or work in the butter until it is all pea size chunks. Squeeze the butter through your fingers into smaller pieces.
Pour in the buttermilk and fold together with a spatula.
Once it starts to come together pour the dough on a floured flat workspace and work it into a ball.
Press and flatten the dough out to about 3/4 of a inch thickness. Take a 3.2 inch round cutter and cut out the cakes. Be sure to cut straight down and don't twist, twisting with seal the layers.
Gently press the leftover dough together and repeat the process.
Brush the tops with buttermilk and sprinkle with coarse sugar. (both optional)
Bake for 13-15 minutes or until golden. Allow them to cool.
Beat the whipping cream and vanilla sugar until firm peeks form.
Cut the shortcakes in half, place strawberries on with some of the juice as well. Then add the cream followed by the top shortcake and more cream and strawberries. Enjoy!