First, prepare the berries by adding them to a medium bowl and sprinkling the granulated white sugar over the top, tossing them to coat. Allow to set for 10 minutes so they sweeten and some juices are released. Set aside.

Second, make the whipped cream: In the bowl of a stand mixer, add in the heavy whipping cream, confectioners' sugar and vanilla and beat with the whisk attachment on HIGH speed for about 5-7 minutes or until stiff peaks form.

To assemble: Using a serrated bread knife, carefully slice each doughnut in half crosswise, creating a top and bottom half. Top the bottoms of the doughnuts with some of the strawberries and juice, then dollop or pipe on whipped cream. Top with more berries, followed by the doughnut "lid" or top. Repeat with remaining doughnuts until you have 6 shortcakes. Serve immediately.