01 - Beat cream cheese in medium bowl until smooth. Add powdered sugar and vanilla extract; beat until fully incorporated. Gently fold in whipped topping until mixture is creamy and smooth throughout.
02 - Sprinkle an even layer of crushed shortbread cookies across the bottom of a glass trifle bowl or individual serving cups.
03 - Spread a generous layer of the whipped cheese mixture over the cookie base, ensuring even coverage.
04 - Distribute sliced strawberries and blueberries evenly over the cream layer.
05 - Continue layering ingredients in the following order: crushed cookies, whipped filling, and mixed berries. Repeat until all ingredients are used, ensuring the final layer is topped with berries for presentation.
06 - Decorate the top with additional fresh berries and mint leaves if desired for an elegant finish.
07 - Refrigerate assembled dessert for at least 1 hour to allow layers to set and flavors to meld. Serve chilled.