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 use the star cookie cutter to cut out as many star shapes as you can.
Fill a decorating bag with vanilla frosting and cut a small tip off the end of the bag.
Use the bag of frosting to draw an outline around the star brownies.
Once all your brownies are frosted, use the sprinkle shaker to coat the frosting in red, white and blue sprinkles.
Place your Patriotic Star Brownies in a covered pan until you are ready to eat them.