In a large mixing bowl, combine the dry ingredients. This includes, 1 1/2 cups all-purpose flour, 1 tbsp sugar,1 tsp baking powder, 1/4 tsp baking soda, 1 tsp salt.
Into the same bowl, shred the cold butter (1/2 cup) using a box grater if you have one available. If not, you can chop it into cubes. Then cut it into the dry mixture using a pastry cutter or fork.
Now add 1/2 cup of discard and 1/2 cup of half and half to the flour mixture. Incorporate the wet ingredients into the dry using your hands. The dough will be dry but will come together after mixing it well by hand.
This next step is crucial for flaky layers. Remove the shortcake dough from the bowl and roll it out on a lightly floured surface. Then fold the right side of the dough towards the center, followed by the left. You can see the technique in the video below. This layers the buttery dough ensuring flaky, fluffy biscuits.
Now finish rolling the dough and 8 large biscuits using a biscuit cutter or circular lid. Place biscuits on a baking sheet lined with parchment paper and then pop them in the freezer for 15 minutes while you prepare the whipped cream and strawberry drizzle.
Remove the biscuits from the freezer and brush the tops with an additional half & half using a pastry brush. Sprinkle with raw sugar and bake in a hot oven at 425°F for 15 minutes.