Preheat your oven to 350 degrees and spray a 9X13″ baking pan with a non-stick cooking spray.
In a large mixing bowl, combine your brownie mix, eggs, oil and water and use a whisk to mix the batter well.
Pour the brownie batter into your baking pan and bake for 20-22 minutes or as directed on the box.
Let your brownies cool in the pan. Set our a piece of parchment paper and cut the brownies into rectangles.
Fill a decorating bag with frosting and frost each brownie.
Place 4 blue M&M’s in the top left corner and use the red and white M&M’s to make 4 rows of stripes.
Once your brownies look like an American flag, set them in a covered container to store.