Serve up a festive American Flag Fruit Pizza to celebrate the holiday.
Move the cookie dough into a parchment lined rectangular baking dish or pan. Press the cookie mixture down into the pan.
Cream the butter, sour cream, and salt together. Add powdered sugar a little at a time, alternating with adding the milk. Add extra milk or powdered sugar if needed to reach your desired consistency. Add food coloring and vanilla and mix until combined. Using a rubber spatular add big dollops of icing onto the cookie bars and spread it evenly. Move the pan into the fridge to chill.
Wash the fresh berries, dry them with a paper towel. Slice the strawberries. Add rows of fresh sliced strawberries and rows of the fresh blueberries to make the top look like a fruit flag.