In a large bowl, add the 1 1/2 cups all-purpose flour, 1/2 cup granulated sugar, 1/4 cup unsweetened cocoa powder, 2 1/4 teaspoons baking powder, 3/4 teaspoon baking soda and 3/4 teaspoon kosher salt
Mix well until combined. Using a hand mixer or stand mixer, add the diced 1/2 cup butter, and mix until you have a crumbly mixture. Add in the diced 1/3 cup semisweet chocolate, 2 large egg yolks, and 3/4 cup heavy cream, and mix until your dough has formed.
Divide the dough into 8 equal-sized portions of dough balls. Use a rolling pin, and flatten the dough into a 1-inch circle. In a shallow bowl, add the 1/2 cup of granulated sugar, and coat both sides of the chocolate biscuit.
Place the biscuits onto the parchment paper, and set the cooking time for 5-8 minutes, or when they are fully cooked. Remove and let cool for 20-30 minutes.
In a large mixing bowl, add the 1 cup heavy cream, and 1 teaspoon lemon juice, and whip until you make the homemade whipped cream.
Toss the 5 cups strawberries with the granulated sugar, and then assemble. Place the shortcake on the bottom, add whipped cream, and sprinkle with some strawberries, then add another shortcake and add more whipped cream and garnish with more strawberries.