Start off by making the sugar cookie crust. In a medium bowl, add the butter, sugar, egg, and vanilla extract. Beat until well combined.
1/2 cup unsalted butter, 3/4 cup granulated sugar, 1 large egg, 1 teaspoon pure vanilla extract
Add in the flour, baking powder, and salt. Mix until just combined. Cover the bowl with plastic wrap and pop in the refrigerator. Chill the dough for 30 minutes.
Meanwhile, grease a 12-inch tart tin or pizza pan with butter or non-stick spray. Preheat the oven to 350 F.
Remove the chilled dough from the refrigerator, drop it onto your tin or pan and use your hands or a spatula to spread it into an even layer. If using your hands, I recommend coating them in oil or non-stick spray to keep the dough from sticking.
Bake for 15-18 minutes or until golden. Remove from the oven and allow to cool down to room temperature before moving onto the next step or the frosting will melt.
Meanwhile, prepare the cream cheese frosting. In a medium bowl, beat the cream cheese, butter, powdered sugar, and vanilla extract until smooth and fluffy.
14 ounces cream cheese, 1/4 cup unsalted butter, 1 & 1/4 cups powdered sugar, 1 tsp pure vanilla extract
Spread 1/2 of the cream cheese frosting onto the sugar cookie crust and use a spatula to spread it all the way to the edges.
Decorate with blueberries and raspberries: simply place the blueberries in a square in the left upper corner to create the blue portion of the flag, then use the raspberries to create seven stripes.
2 cups blueberries, 1 cup heaping raspberries
Place the remaining cream cheese frosting into a piping back fitted with a closed star tip or your favorite tip and pipe on the white stripes.
Slice and serve!
Notes
Use premade sugar cookie dough if you do not want to make your own.
You can also use store bought frosting for this recipe as well.
If you want a square pizza place in a smaller rectangle baking pan.
Whipped cream or buttercream frosting can be substituted for the cream cheese frosting.
Strawberries can be substituted for the raspberries.