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Perfect Flag Day American Flag Cookie Sheet Cake Recipe with Easy Cream Cheese Frosting

american flag cookie sheet cake - featured image

A quick and easy American flag-themed cookie sheet cake topped with smooth cream cheese frosting and fresh berries, perfect for patriotic holidays and summer gatherings.

Ingredients

Scale
  • 2 ½ cups (310g) all-purpose flour, sifted
  • 1 ¾ cups (350g) granulated sugar
  • 2 teaspoons baking powder
  • ½ teaspoon salt
  • ¾ cup (170g) unsalted butter, melted and slightly cooled
  • 3 large eggs, at room temperature
  • 1 cup (240ml) whole milk (can substitute almond milk for dairy-free)
  • 2 teaspoons pure vanilla extract
  • 8 oz (225g) cream cheese, softened but still cool
  • ½ cup (113g) unsalted butter, softened
  • 3 cups (360g) powdered sugar, sifted
  • 1 teaspoon pure vanilla extract
  • Pinch of salt
  • 1 ½ cups fresh strawberries, hulled and sliced
  • 1 cup fresh blueberries, washed and patted dry
  • Optional: white chocolate chips or mini marshmallows for extra star effect

Instructions

  1. Preheat oven to 350°F (175°C) and grease a 9×13-inch baking pan with butter or non-stick spray. Line with parchment paper if desired.
  2. In a large bowl, whisk together sifted flour, granulated sugar, baking powder, and salt until well combined.
  3. In a separate bowl, whisk melted butter, eggs, milk, and vanilla extract until smooth. Ensure butter is not too hot.
  4. Pour wet ingredients into dry ingredients and fold gently with a rubber spatula until just combined. Batter should be thick but pourable.
  5. Spread batter evenly in prepared pan and tap lightly on counter to release air bubbles.
  6. Bake for 30-35 minutes or until a toothpick inserted in the center comes out clean or with a few moist crumbs.
  7. Remove cake from oven and transfer to wire rack. Cool completely (about 1 hour) before frosting.
  8. While cake cools, beat softened cream cheese and butter until smooth and creamy. Gradually add powdered sugar one cup at a time, beating on low speed until combined.
  9. Add vanilla extract and pinch of salt, then whip on medium-high speed until fluffy and smooth.
  10. Spread cream cheese frosting evenly over cooled cake using an offset spatula or butter knife.
  11. Arrange sliced strawberries in horizontal stripes across the cake. Reserve top left corner for blueberries, pressing them gently into frosting.
  12. Optionally, sprinkle mini marshmallows or white chocolate chips among blueberries for extra star effect.
  13. Refrigerate cake for at least 30 minutes to set frosting before slicing and serving.

Notes

Do not overmix the batter to avoid a dense crumb. Soften cream cheese and butter properly to avoid lumps in frosting. Cool cake completely before frosting to prevent melting. Use fresh, firm berries to avoid color bleeding. Slice cake with a sharp knife dipped in hot water for clean cuts.

Nutrition

Keywords: Flag Day cake, American flag cake, sheet cake, cream cheese frosting, patriotic dessert, berry cake, easy cake recipe