01 - Beat softened cream cheese in a medium bowl until completely smooth. Add powdered sugar and vanilla extract; continue beating until fully incorporated. Gently fold in whipped topping using a spatula until mixture is creamy and uniform.
02 - Sprinkle an even layer of crushed shortbread cookies across the bottom of a glass trifle bowl or individual serving glasses, creating approximately 1/4-inch thickness.
03 - Spread one-third of the whipped cheese mixture over the cookie base, smoothing with the back of a spoon to create an even layer.
04 - Arrange sliced strawberries, blueberries, and raspberries over the cream layer, distributing evenly for colorful presentation.
05 - Continue layering in the following order: remaining crushed cookies, whipped filling, and mixed berries. Repeat until all ingredients are used, ensuring the final layer is berries for visual appeal.
06 - Top with additional fresh berries and mint leaves if desired. Refrigerate uncovered for at least 1 hour to allow flavors to meld and layers to set before serving.