01 - Set oven temperature to 350°F (175°C).
02 - Press the refrigerated sugar cookie dough evenly across the bottom of an ungreased 13x9-inch baking sheet or rectangular pizza pan.
03 - Bake for 15 to 18 minutes until edges are lightly golden. Remove from oven and allow crust to cool completely.
04 - In a medium bowl, beat together cream cheese, unsalted butter, powdered sugar, and vanilla extract until the mixture is smooth and creamy.
05 - Evenly spread the frosting over the cooled sugar cookie crust using a spatula.
06 - Arrange blueberries in the top left corner to form the star section. Alternate rows of sliced strawberries and bananas across the remaining space to create flag stripes.
07 - Refrigerate for at least 30 minutes. Slice into portions and serve chilled.