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Home » Summer Recipes » Flag Cake

Flag Cake

Published: Jun 26, 2019 · Modified: Jul 19, 2019 by Allison · 6 Comments

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Whip up this fun and festive homemade American Flag Cake! A fluffy vanilla cake topped with creamy vanilla frosting and finished with fresh berries.

American flag cake decorated with strawberries, blueberries and white frosting.

It’s not the 4th of July until someone makes a Flag Cake! Although this cake is far from original (I’m not even going to pretend like I invented this concept, ha!), this version is one of the best. Fluffy vanilla cake, homemade vanilla frosting, and plenty of beautiful fresh berries!

MORE SUMMER DESSERTS: STRAWBERRY SHORTCAKE CAKE – BLUEBERRY PIE – BERRY TRIFLE – STRAWBERRY SHORTCAKE 

Vanilla sheet cake topped with vanilla frosting and chopped strawberries.

Flag Cake:

  • Homemade Vanilla Cake: The base of this recipe is my favorite vanilla cake recipe. It is moist and fluffy and it comes together quickly and easily. Bake the cake in a sheet pan: 9×13 or 10x15x1 (more on this below).
  • Fluffy Buttercream Frosting: A classic vanilla buttercream frosting tops this cake. This recipe makes enough to frost the top of the cake as well as pipe extra frosting around the border and for the white stripes.
  • Berries: You’ll need blueberries for the”star” portion of the flag, as well as red berries for the stripes. I used chopped strawberries, but you can use sliced strawberries or raspberries (or even a combination). See my tip in the recipe card for getting the berries extra juicy!

The combination of tender cake, creamy vanilla frosting and fresh berries makes this dessert incredibly delicious! My family enjoyed this cake so much that I’m planning on making it (sans flag design) all summer long.

How to make Vanilla Cake (batter in a large white bowl).

How to Decorate a Flag Cake:

  • Once the cake is baked and cooled, top it with a layer of vanilla frosting.
  • Place the remaining frosting in a piping bag fitted with your desired tip (I used an open star tip).
  • Pipe a border around the perimeter of the cake.
  • Place the blueberries in the upper left corner of the cake.
  • Create stripes by alternating a row of strawberries with a row of piped white frosting.

American flag cake decorated with strawberries, blueberries and white frosting.

Cake Pan Sizes:

You can bake this cake in a 9×13 pan or a 10x15x1 “jelly roll” pan (pictured). Note: If using a 10x15x1 pan, the cake will rise all the way to the top of the pan. Be careful not to overmeasure the ingredients when preparing the batter. 

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Slice of vanilla cake on a white plate topped with strawberries and vanilla frosting.

You might also like:

BERRY TRIFLE

Large trifle dish with layers of berries, cake and whipped cream.

SUGAR COOKIE FRUIT TARTS

Sugar cookies topped with frosting and berries.

American flag cake decorated with strawberries, blueberries and white frosting.

Flag Cake

Whip up this fun and festive homemade American Flag Cake! A fluffy vanilla cake topped with creamy vanilla frosting and finished with fresh berries.
5 from 3 votes
Print Pin SaveSaved!
Course: Dessert
Cuisine: Dessert
Prep Time: 45 minutes
Cook Time: 25 minutes
Total Time: 1 hour 10 minutes
Servings: 20
Calories: 439kcal
Author: Allison - Celebrating Sweets

Ingredients

Cake:

  • 2 ½ cups all purpose flour
  • 2 teaspoons baking powder
  • ½ teaspoon salt
  • 1 ¾ cups granulated sugar
  • ½ cup vegetable or canola oil
  • 2 large eggs
  • 2 large egg whites
  • 2 teaspoons pure vanilla extract
  • ¾ teaspoon almond extract, optional, but highly recommended
  • ⅔ cup sour cream
  • ¾ cup milk, preferably whole or 2%

Frosting:

  • 1 ½ cups unsalted butter, softened to cool room temperature
  • 5 cups powdered sugar, plus more, if needed
  • 1-2 tablespoons half & half, cream or milk
  • 2 teaspoons pure vanilla extract
  • ½ teaspoon almond extract, optional, but highly recommended
  • pinch salt

Topping:

  • 1 pound (approx) fresh strawberries, sliced or chopped
  • 30-40 fresh blueberries

Instructions

Cake:

  • Preheat oven to 350°F with a rack placed in the center.
  • In a medium bowl, whisk flour, baking powder and salt until combined. Set aside.
  • Using a stand mixer fitted with the paddle attachment (preferred) or a hand mixer, beat sugar, oil, eggs, egg whites, and extracts until fully combined (about one full minute). Add the sour cream and beat until combined. Add half of the flour mixture, beating until just combined. While still beating, slowly add milk, then the remaining flour mixture, scraping the sides and bottom of the bowl as needed. Mix the batter fully, but be careful not to overmix it.
  • Pour the batter into a greased 9x13 baking pan (see note). Tap the pan on the countertop a couple times to remove any air bubbles. Bake for 25-30 minutes, until a toothpick inserted into the center comes out clean. If necessary, rotate the pan once during bake time to ensure even browning. Place the pan on a rack to cool completely.

Frosting:

  • Using a hand mixer, or stand mixer fitted with the paddle attachment, beat butter and 2 cups of the powdered sugar until well-combined. Continue to add remaining powdered sugar one cup at a time (starting out the mixer low and increasing to medium-high). Add extracts, 1 tablespoon milk and salt, beat until well combined. Add more milk, if necessary. Turn the mixer to medium-high and beat well for 1-2 minutes.  
    Note: Depending on how thick you want the frosting, you can easily adjust the consistency by adding more powdered sugar (to thicken) or more milk (to thin). 

Assembly:

  • Using about ⅓ of the frosting, spread an even layer over the top of the cake. Place remaining frosting in a piping bag fitted with your desired tip (I used a star tip).
  • Pipe a border around the perimeter of the cake. Place the blueberries in the upper left corner to form the "star" portion of the flag. Alternate rows of strawberries and piped frosting for the stripes.

Notes

Pan sizes: This cake can also be baked in a 10x15x1 "jelly roll" pan (as pictured). Note: The cake will rise all the way to the top of the jelly roll pan. Be careful not to overmeasure the ingredients when preparing the batter. Bake the 10x15x1 cake for 18-23 minutes, until a toothpick inserted into the center comes out clean.
Tip: If your strawberries are not very sweet and juicy, you can toss them with a little sugar or some strawberry jam (thin it out in the microwave for a few seconds). This will make them extra juicy and glossy.

Nutrition

Calories: 439kcal | Carbohydrates: 60g | Protein: 3g | Fat: 22g | Saturated Fat: 14g | Cholesterol: 58mg | Sodium: 92mg | Potassium: 119mg | Fiber: 1g | Sugar: 46g | Vitamin A: 505IU | Vitamin C: 13.6mg | Calcium: 51mg | Iron: 1mg

Nutritional Information is an estimate based on third-party calculations and may vary based on products used and serving sizes.

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Comments

  1. Renee Goerger

    June 26, 2019 at 1:45 pm

    5 stars
    This is the most perfect cake to celebrate the 4th of July. I’ll bet it gets more oohs and aahs than the fireworks!

    Reply
  2. Justine

    June 26, 2019 at 1:54 pm

    5 stars
    Such a simple dessert, but perfect for celebrating on the 4th!

    Reply
  3. Sue Harris

    July 04, 2022 at 10:49 pm

    5 stars
    This was really yummy, and perfect for the 4th of July! I baked it in a casserole dish w handles because I wanted to be able to carry it. Turned out beautiful! Had extra lb. of chopped strawberries which were appreciated. Everyone loved.

    Reply
    • Allison

      July 07, 2022 at 10:19 am

      I’m so glad!

      Reply
      • Carrie kniffin

        July 28, 2022 at 11:31 am

        I want to decorate a nobake cheesecake like this can I use whipped cream instead of the frosting?

      • Allison

        July 29, 2022 at 1:00 pm

        You probably want a stabilized whipped cream so that it doesn’t lose its shape over time. If you’re going to decorate and serve right away you should be ok with just regular (homemade) whipped cream whipped to stiff peaks.

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aboutHi, I'm Allison! I'm a busy wife and mom with a passion for cooking and baking. This is where you'll find my favorite homemade recipes, designed to help you make every day delicious! Read more....

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