01 - Set the oven to 350°F (175°C) and allow it to fully preheat.
02 - Press the sugar cookie dough evenly onto an ungreased 13 x 9 inch baking sheet or rectangular pizza pan to cover the base.
03 - Bake the crust for 15 to 18 minutes until the surface is lightly golden. Remove from the oven and cool completely on a rack.
04 - In a medium bowl, beat together cream cheese, unsalted butter, powdered sugar, and vanilla extract until the mixture is smooth and creamy.
05 - Spread the cream cheese frosting evenly over the entire cooled cookie crust using a spatula.
06 - Place blueberries in the top left corner to form the field of stars. Arrange alternate rows of strawberry and banana slices across the remaining surface to create red and white stripes.
07 - Refrigerate for at least 30 minutes to set. Slice into portions and serve chilled.