American Flag Sheet Cake
A showstopping patriotic cake with fresh berry flag design
By RecipesQueen Kitchen • June 10, 2026
American flag cake searches are spiking 500% monthly as July 4th approaches. This sheet cake version is the easiest way to create a stunning patriotic dessert that feeds a crowd — a moist vanilla cake topped with fluffy whipped cream and fresh berries arranged in an American flag design.
The layout is simpler than it looks: blueberries form the star field in the top left corner, and rows of sliced strawberries create the red stripes, with white whipped cream showing through as the white stripes. The key is using a 9x13 pan and being deliberate with the berry placement.
This cake is best assembled the day you plan to serve it, so the whipped cream stays fresh and the berries look vibrant. It's the kind of dessert that gets cheers when you bring it to the table.
Ingredients
- 2 cups all-purpose flour
- 1 1/2 cups granulated sugar
- 3/4 cup unsalted butter, softened
- 3 large eggs
- 1 cup buttermilk
- 2 tsp vanilla extract
- 2 tsp baking powder
- 1/2 tsp salt
- 3 cups heavy whipping cream
- 1/3 cup powdered sugar
- 2 pints fresh strawberries, sliced
- 1 pint fresh blueberries
Instructions
- 1
Preheat oven to 350°F (175°C). Grease and flour a 9x13-inch baking pan.
- 2
Cream butter and sugar until fluffy. Add eggs one at a time, then vanilla. Alternately add flour mixture (flour, baking powder, salt) and buttermilk. Pour into pan.
- 3
Bake for 28-32 minutes until golden and a toothpick comes out clean. Cool completely in the pan.
- 4
Whip the heavy cream with powdered sugar until stiff peaks form. Spread evenly over the cooled cake.
- 5
Create the flag: Place blueberries in a rectangle in the top left corner (about one-third of the cake). Arrange rows of sliced strawberries horizontally across the rest of the cake to create red stripes, leaving white whipped cream visible between rows.
- 6
Refrigerate for at least 1 hour before serving. Slice and serve cold.
