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Flag Sheet Cake

Flag Sheet Cake: An easy vanilla sheet cake with whipped cream frosting, decorated as a flag with blueberries and raspberries.
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An easy vanilla sheet cake with whipped cream frosting, decorated as a flag with blueberries and raspberries.

Makes: 20 servings · Pan: 9 × 13-inch pan · Oven: 350 °F (175 °C) · Holiday: Fourth of July

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Ingredients

VolumeGrams
Cake
2 1/4 cups all-purpose flour270 g
1 1/2 cups granulated sugar297 g
1 tbsp baking powder12 g
1/2 tsp table salt3 g
3/4 cup unsalted butter, softened170 g
3 large eggs150 g
1 cup milk227 g
2 tsp vanilla extract9.3 g
Topping
8 oz cream cheese, softened227 g
3/4 cup powdered sugar85 g
1 1/2 cups heavy cream, cold340 g
1 cup blueberries—
2 cups raspberries—

Gram weights use the King Arthur Baking ingredient weight chart; amounts given in lb or oz are converted by weight (1 lb = 453.6 g, 1 oz = 28.35 g); “—” means the ingredient isn’t on the chart, so measure it by volume or count. Measure flour by spooning it into the cup and leveling, or better, weigh it.

Method

  1. Heat the oven to 350 °F and grease the pan.
  2. Whisk the flour, sugar, baking powder and salt. Beat in the soft butter until sandy, then beat in the eggs, milk and vanilla until smooth, 1–2 minutes.
  3. Spread in the pan and bake 28–32 minutes, until a toothpick comes out clean. Cool completely.
  4. Beat the cream cheese and powdered sugar smooth, then add the cream and whip to firm peaks. Spread over the cake.
  5. Arrange blueberries in the top-left corner for the stars and lines of raspberries for the stripes. Chill until serving.

Tips

  • Keep it in the fridge until serving on hot days; the cream-cheese whipped topping holds its shape well.

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