Berry Flag Cake

Name: Berry Flag Cake
Prep time: 30 min
Cook time: 30 min
Total time: 60 min
Yield: 16 servings
Cuisine: American
Ingredients: 3 cups all-purpose flour; 2 cups granulated sugar; 1 tbsp baking powder; 1 tsp salt; 1 cup unsalted butter, softened; 4 egg; 1 1/2 cups whole milk; 2 tsp vanilla extract; 2 cups heavy cream, chilled; 1/2 cup powdered sugar; 2 cups fresh blueberries; 3 cups fresh strawberries, sliced

A red-white-and-blue sheet cake for warm-weather parties: whipped cream frosting with a blueberry field in one corner and clean strawberry stripes across the rest, the flag-cake trend that came back for the summer of 2026. Plan ahead: cool the cake completely, about 1 hour, before frosting.

60 minMediumServes 16440 cal/serving

AmericanDessertOvenVegetarianLow-SodiumPork-FreeNightshade-Free

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Ingredients

3 cups all-purpose flour
2 cups granulated sugar
1 tbsp baking powder
1 tsp salt
1 cup unsalted butter, softened
4 egg
1 1/2 cups whole milk
2 tsp vanilla extract
2 cups heavy cream, chilled
1/2 cup powdered sugar
2 cups fresh blueberries
3 cups fresh strawberries, sliced

Instructions

1

Preheat the oven to 350 degrees F and grease a 9x13-inch baking pan.
2

In a bowl, whisk together 3 cups all-purpose flour, 1 tbsp baking powder, and 1 tsp salt.
3

In a large bowl, cream 1 cup softened unsalted butter and 2 cups granulated sugar until light and fluffy, then beat in 4 egg and 2 tsp vanilla extract.
4

Add the dry ingredients in two additions, alternating with 1 1/2 cups whole milk, mixing just until smooth. Pour the batter into the prepared pan and spread evenly.
5

Bake until a toothpick inserted in the center comes out clean, 26 to 30 minutes. Cool completely in the pan, about 1 hour.
6

Beat 2 cups chilled heavy cream and 1/2 cup powdered sugar together until stiff peaks form, then spread evenly over the cooled cake.
7

Arrange 2 cups fresh blueberries in a rectangle in the upper left corner of the cake to form the field, then arrange 3 cups sliced fresh strawberries in straight rows across the rest of the cake to form the stripes.

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Questions

What oven temperature does Berry Flag Cake need?

For Berry Flag Cake, the oven is set to 350 F (about 175 C) in step 1. The longest stretch at that heat is 30 minutes, in step 5.

Is there a substitute for powdered sugar in Berry Flag Cake?

The entry for Berry Flag Cake calls for 1/2 cup powdered sugar. In its place: Blend granulated sugar with a teaspoon of cornstarch per cup until fine.

Can I make Berry Flag Cake gluten-free?

Yes. The gluten in Berry Flag Cake is 3 cups all-purpose flour. Swap the flour for a 1-to-1 gluten-free baking blend (where it only thickens a sauce, half as much cornstarch also works). Everything else proceeds as written.

Is Berry Flag Cake vegan?

No, though it is vegetarian. What keeps it from vegan is 1 cup unsalted butter, softened, 1 1/2 cups whole milk, 2 cups heavy cream, chilled and 4 egg. For fully plant-based entries, see the vegan dessert collection.

Does Berry Flag Cake contain eggs?

Yes: 4 egg. The full allergen list for this entry is gluten, dairy and eggs. Packaged ingredients vary by brand, so check labels if the allergy is serious.

Can I start Berry Flag Cake the day before?

Yes. Step 5 is a built-in pause of 1 hour: "Cool completely in the pan, about 1 hour." Do everything up to that point ahead of time and pick up at step 6 when you are ready to finish.

Serve it with

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