01 - In a medium bowl, beat cream cheese until smooth. Add powdered sugar and vanilla extract; beat until incorporated. Fold in whipped topping until creamy and smooth.
02 - In a glass trifle bowl or individual cups, sprinkle a layer of crushed shortbread cookies.
03 - Add a layer of the whipped cheese mixture over the cookie base.
04 - Top with a layer of sliced strawberries and blueberries.
05 - Repeat layers: cookies, whipped filling, mixed berries, until all ingredients are used, finishing with berries on top.
06 - Garnish with additional berries and mint leaves if desired.
07 - Chill in the refrigerator for at least 1 hour before serving to set.