Surprise-Inside Flag Cake

updated Jun 23, 2020
summer
Flag Cake
This stately, whipped cream-gilded cake has a colorful surprise inside that makes this vanilla-cake-meets-berry-shortcake recipe stand out from the rest.

Serves16

Prep30 minutes

Cook25 minutes to 30 minutes

Jump to Recipe
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(Image credit: Joe Lingeman)

One of my favorite annual traditions is making this super-simple flag cake with my daughter. Yes, turning a cake into an American flag is somewhat cliché, but if you consider this the best way to dress up berry shortcake then it’s as fun to make as it is to share.

This charming, whipped cream-frosted cake has a colorful surprise inside. It’s what makes this vanilla-cake-meets-berry-shortcake recipe stand out from the rest.

The Secret Surprise Inside Flag Cake

To make a big impact, portions of the batter are dyed red and blue and then swirled into the pan to create a patriotic surprise inside.

A sweetened whipped cream is the best topping for this cake, as it complements both the cake and the berries. Use blueberries and sliced strawberries to decorate the top of the cake.

(Image credit: Joe Lingeman)

Flag Cake

This stately, whipped cream-gilded cake has a colorful surprise inside that makes this vanilla-cake-meets-berry-shortcake recipe stand out from the rest.

Prep time 30 minutes

Cook time 25 minutes to 30 minutes

Serves 16

Nutritional Info

Ingredients

For the cake:

  • Cooking spray

  • 3 cups

    all-purpose flour

  • 1 1/2 cups

    granulated sugar

  • 1 1/2 teaspoons

    baking powder

  • 3/4 teaspoon

    salt

  • 3

    large eggs

  • 3/4 cup

    canola oil, or melted and cooled unsalted butter

  • 1 cup

    whole milk

  • 1 tablespoon

    vanilla extract

  • Red food coloring

  • Blue food coloring

For the whipped topping:

  • 2 cups

    cold heavy cream

  • 3/4 cup

    granulated sugar

  • 1 teaspoon

    vanilla extract

  • 4 cups

    fresh strawberries, stemmed and sliced

  • 1 1/2 cups

    fresh blueberries

Instructions

Make the cake:

  1. Arrange a rack in the middle of the oven and heat the oven to 350°F. Coat a 9x13-inch baking pan with cooking spray; set aside.

  2. Whisk the flour, sugar, baking powder, and salt in together a large bowl. Add the eggs, oil or butter, milk, and vanilla and mix with an electric hand mixer on medium speed until smooth, about 1 minute.

  3. Pour 1/2 of the batter into the prepared baking pan. Divide the remaining batter between two bowls. Dye one red with 3 to 4 drops of red food coloring, and dye the other blue with 4 to 5 drops of blue food coloring. Dollop the red and blue batter onto the white cake batter. You can do a pattern or random placement.

  4. Bake until the cake is lightly browned and springs back when tapped gingerly, 25 to 30 minutes. Cool on a wire rack for 30 minutes. Remove the cake from the pan and cool completely on the rack.

Make the whipped topping:

  1. Place the cream, sugar, and vanilla in a large bowl. Beat with an electric hand mixer on medium-high speed until stiff peaks form.

  2. Cover the entire cake with the whipped cream frosting. Arrange the berries in a flag shape by making a square of blueberries in the top lefthand corner and then making stripes with the sliced strawberries. You can use a small offset spatula to mark lines for the stripes, if needed.

  3. Refrigerate the cake for up to 4 hours before serving or serve immediately.

Recipe Notes

Make ahead: The cake can be baked, cooled, wrapped, and stored in the fridge several days in advance. Bring to room temperature before frosting.