Creating Mixed Berry Mini Trifles is straightforward if you follow these simple steps:

1. Prepare the Berries: Wash and slice the strawberries. Set aside the blueberries and raspberries.
2. Make the Whipped Cream: In a mixing bowl, whip the heavy cream until soft peaks form. Gradually add the powdered sugar and vanilla extract, continuing to whip until stiff peaks form.
3. Prepare the Pudding: If using store-bought pudding, simply set it aside. If making homemade pudding, prepare it according to your recipe and let it cool.
4. Crush the Cookies: In a separate bowl, crush the graham crackers or ladyfinger cookies into small pieces.
5. Layer the Trifles: In small dessert cups or jars, start by adding a layer of crushed cookies at the bottom.
6. Add Pudding Layer: Spoon a layer of vanilla pudding over the cookies.
7. Add Berries Layer: Follow with a layer of mixed berries, distributing them evenly.
8. Add Whipped Cream: Top with a generous layer of whipped cream.
9. Repeat Layers: Repeat the layers until the cups are filled, finishing with whipped cream on top.
10. Chill the Trifles: Place the assembled trifles in the refrigerator for at least 30 minutes to allow the flavors to meld.
11. Garnish and Serve: Just before serving, garnish with a few whole berries and a sprig of mint if desired.

These steps will guide you in creating these incredible trifles effortlessly.