Preheat oven to 425 degrees F and line a baking sheet with parchment paper.
Stir together baking mix, melted butter and cranberry juice in a large bowl, until a soft dough forms. Drop in 4 even mounds onto the baking sheet. Sprinkle the tops with sugar and bake for 10 to 12 minutes or until golden brown. Remove and cool completely.
For Strawberry Sauce:
In a medium bowl whisk together sugar, cornstarch and cranberry juice. In a large skillet combine strawberries with cornstarch mixture. Stir together and bring to a simmer over medium heat making sure to stir often. Turn down heat to low and simmer for 5 minutes or until thickened. Remove from heat and let cool slightly.
In a large mixing bowl that has been chilled, combine the heavy cream and powdered sugar and beat with a hand mixer until soft peaks form.
To serve, cut each cooled shortcake in half horizontally and place bottoms on serving plates. Spoon a few tablespoons of the warm strawberry sauce over each of the shortcake bottoms. Place shortcake tops on fruit. Spoon on a little more strawberry sauce and top with whipped topping.
In the bowl of a food processor combine flour, baking powder and salt. Pulse for 15 seconds. Add shortening and pulse until mixture is similar in texture to cornmeal. If you do not have a food processor shift together the flour, baking powder, and salt into a large bowl. Cut in the shortening with a fork or pastry blender until mixture is similar in texture to cornmeal.
Use in recipes that call for Bisquick or all-purpose baking mix.