Creating these amazing Patriotic Strawberry Shortcake Trifles is simple. Just follow these steps:

1. Prepare Strawberries: In a medium bowl, combine the sliced strawberries with 1 tablespoon of sugar. Toss gently and let them sit for about 10-15 minutes to release their juices.
2. Bake Cake: Prepare the vanilla cake mix according to the package instructions. Bake in a 9×13 inch pan and let it cool completely.
3. Make Whipped Cream: In a large bowl, whip the heavy cream until soft peaks form. Gradually add the powdered sugar and vanilla extract, continuing to whip until stiff peaks form.
4. Crumble Cake: Once the cake is cool, crumble it into bite-sized pieces in a large bowl.
5. Assemble Trifles: In each clear cup or mason jar, layer the ingredients: start with a layer of crumbled cake, followed by a layer of strawberries, and then a layer of whipped cream. Repeat the layers until the cups are filled, finishing with whipped cream on top.
6. Garnish: Top each trifle with a few fresh blueberries for a patriotic touch.
7. Chill: Place the assembled trifles in the refrigerator for at least 30 minutes to allow the flavors to meld.
8. Serve: Enjoy your beautifully layered Patriotic Strawberry Shortcake Trifles chilled!