Creating American Flag Brownies is simple if you follow these steps:

1. Preheat the Oven: Preheat your oven to 350°F (175°C). Grease and line a 9×13 inch baking pan with parchment paper.
2. Melt the Butter: In a saucepan, melt the butter over low heat. Remove from the heat and let cool slightly.
3. Mix Wet Ingredients: In a mixing bowl, combine the melted butter and granulated sugar. Stir in the eggs one at a time, and then mix in the vanilla extract.
4. Combine Dry Ingredients: In another bowl, whisk together the flour, cocoa powder, baking powder, and salt.
5. Mix Ingredients Together: Gradually add the dry ingredients to the wet ingredients, stirring until fully combined and smooth.
6. Bake the Brownies: Pour the batter into the prepared baking pan and bake for 25-30 minutes or until a toothpick inserted in the center comes out clean.
7. Cool: Once baked, allow the brownies to cool in the pan for about 10-15 minutes before transferring to a wire rack to cool completely.
8. Frost the Brownies: Spread a generous layer of cream cheese frosting over the cooled brownies.
9. Create the Flag Design: On one side of the brownies, place rows of blueberries to represent the stars, and on the other side, create stripes using the sliced strawberries.
10. Finish and Serve: Optionally dust with powdered sugar before cutting into squares and serving.