Add the strawberries and sugar to a large bowl and toss to combine. Cover and refrigerate until ready to use.
Line a baking sheet with a silicone baking mat or parchment paper and heat oven to 400°F.
Mix the flour, granulated sugar, baking powder, and salt together in a large bowl or in a large food processor. Whisk or pulse until combined.
Add the cubed butter and cut into the dry ingredients with a pastry cutter or your fingers or by pulsing several times in the food processor until coarse crumbs form.
Transfer to a large mixing bowl and mix in the cream until combined.
Form the dough into 12 large, tall mounds using a large spoon or ice cream scoop and space 2 inches apart on the prepared baking sheet.
Brush each biscuit with heavy whipping cream sprinkle the tops with remaining 1 teaspoon sugar.
Bake for 15 to 20 minutes until biscuits are golden brown on top.
While the biscuits are baking, make the whipped cream. Using a stand mixer fitted with the whisk attachment or a large bowl and an electric hand mixer, whip the cream, sugar, and vanilla extract on medium-high speed until stiff peaks form.
To assemble the shortcakes, split the biscuits in half crosswise. Spoon strawberries over the bottom half and top with a dollop of whipped cream. Finish with the top biscuit. Serve immediately. These are great when the biscuits are still warm!