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4th of July Brownies

4th of July brownies with dense fudgy brownie base and a thick white vanilla frosting layer, decorated with sliced strawberries and blueberries in an American flag pattern. This easy brownie recipe bakes in a 9x13 pan, then finishes with a chilled, clean slice-ready flag design.
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Prep Time 15 minutes
Cook Time 30 minutes
cooling 1 hour
Total Time 1 hour 45 minutes
Servings: 16 servings
Course: Dessert
Cuisine: American
Calories: 380
Ingredients Equipment Method Notes

Ingredients
  

Brownie base
  • 1 box fudge brownie mix Use the mix’s box ingredients and baking instructions for the brownie portion.
White vanilla frosting
  • 2 cup powdered sugar
  • 4 oz cream cheese Softened.
  • 2 tbsp butter Softened.
  • 1 tsp vanilla extract
  • 2.5 tbsp milk Add gradually until spreadable; 2–3 tbsp total.
Flag toppings
  • 1 cup fresh strawberries Sliced, for red stripes.
  • 1 cup fresh blueberries Set tightly packed for the blue canton.

Equipment

  • 1 sheet pan

Method
 

Bake and cool the brownies
  1. Bake the fudgy brownies in a 9x13 pan according to the fudge brownie mix package directions, until a toothpick comes out with moist crumbs. Let cool completely for at least 1 hour, until the surface is no longer warm (cooling cue: fully set and room temperature).
  2. Prepare the frosting by beating cream cheese, butter, powdered sugar, vanilla extract, and milk together until smooth and spreadable. Beat until there are no lumps and the texture holds a thick ribbon (visual cue: glossy, creamy frosting).
Frost and decorate the flag
  1. Spread the cream cheese frosting in an even layer over the cooled brownies, smoothing to the edges. Work quickly so the frosting stays thick and doesn’t pull the brownie crumb (visual cue: uniform white top layer).
  2. In the upper left corner, arrange a rectangle of blueberries tightly packed to form the canton. Press them gently into the frosting so they stay put (visual cue: solid blue block).
  3. Create red stripes across the rest of the brownies using rows of sliced strawberries laid flat. Place rows in a straight pattern across the surface (visual cue: clear red bands).
  4. Leave alternating gaps between strawberry rows as the white stripe showing through the frosting. Adjust spacing so the white lines remain visible between each strawberry row (visual cue: alternating red and white bands).
Chill, cut, and serve
  1. Refrigerate the brownies for 30 minutes to set the frosting. Chill until firm enough to cut cleanly (visual cue: frosting looks set and matte, not soft).
  2. Cut into squares and serve. For the cleanest slices, cut when chilled and wipe the knife between cuts (visual cue: crisp edges through the strawberry and blueberry topping).

Notes

Pro tip: cool the brownies fully (at least 1 hour) before frosting—warm brownies can melt the frosting and blur the flag pattern. Store in the refrigerator up to 4 days; freeze for up to 2 months (wrap tightly) and thaw overnight in the fridge. For a lighter option, use reduced-fat cream cheese and butter in the frosting while keeping the same powdered sugar ratio for structure.