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Easy Patriotic Flag Sheet Cake Recipe Under 3 Dollars Perfect for Fourth of July

Easy Patriotic Flag Sheet Cake - featured image

A quick, affordable, and festive sheet cake decorated like the American flag using fresh berries. Perfect for Fourth of July celebrations, this moist and fluffy cake uses simple pantry staples and costs under $3.

Ingredients

Scale
  • 1 Β½ cups (190g) all-purpose flour
  • 1 cup (200g) granulated sugar
  • 1 tsp baking powder
  • Β½ tsp baking soda
  • ΒΌ tsp salt
  • Β½ cup (120ml) vegetable oil
  • 1 cup (240ml) buttermilk or milk with 1 tbsp lemon juice
  • 2 large eggs (room temperature)
  • 1 tsp vanilla extract
  • 1 cup (230g) unsalted butter, softened
  • 3–4 cups (360–480g) powdered sugar, sifted
  • 2 tbsp milk or cream
  • 1 tsp vanilla extract
  • Pinch of salt
  • 1 cup fresh strawberries, sliced
  • 1 cup fresh blueberries

Instructions

  1. Preheat your oven to 350Β°F (175Β°C). Grease a 9×13 inch pan with butter or non-stick spray and lightly dust with flour.
  2. In a large bowl, whisk together the flour, sugar, baking powder, baking soda, and salt.
  3. In another bowl, whisk the vegetable oil, buttermilk (or milk + lemon juice), eggs, and vanilla extract until smooth.
  4. Pour the wet mixture into the dry ingredients and stir gently until just combined. Do not overmix.
  5. Pour batter into the prepared pan and spread evenly. Tap the pan gently on the 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. Let the cake cool in the pan for 10 minutes, then transfer to a wire rack or leave in the pan to cool completely.
  8. Beat softened butter on medium speed until creamy (about 2 minutes). Gradually add powdered sugar one cup at a time, alternating with milk, and beat until fluffy. Add vanilla and a pinch of salt; adjust sweetness or consistency as needed.
  9. Spread an even layer of frosting over the cooled cake.
  10. Arrange blueberries in the top-left corner to form the blue field of the flag. Place sliced strawberries in horizontal rows across the rest of the cake to mimic the red stripes, leaving white frosting stripes visible.
  11. Optionally, refrigerate the cake for 30 minutes to set the frosting and make slicing easier.

Notes

Do not overmix the batter to avoid a tough cake. Use room temperature eggs and milk for a lighter crumb. Fresh berries are preferred for vibrant color and natural sweetness; if using frozen, thaw and drain well. Frost a completely cooled cake to prevent melting. For easier slicing, chill the cake after frosting. If edges crisp too much, cover with foil halfway through baking. Adjust frosting consistency with milk or powdered sugar as needed.

Nutrition

Keywords: Fourth of July, patriotic cake, sheet cake, flag cake, easy dessert, budget-friendly, berry cake, festive dessert