This American Flag Cake is made with an easy homemade vanilla cake then topped with a simple whipped cream frosting and finished with fresh strawberries and blueberries. A great holiday dessert that will be a masterpiece on the dessert table.
Preheat oven to 375°F and grease a rimmed 15x10 baking sheet.
In a large sauce pan over medium heat, melt the butter.
Once melted, whisk in warm water and bring to a boil. Once it starts to boil, remove from heat.
Whisk in sugar, all purpose flour, baking powder and salt just until combined.
Whisk in plain Greek yogurt.
Add the beaten eggs and vanilla extract and whisk until fully incorporated.
Pour batter into prepared sheet pan.
Bake for 15-20 minutes until toothpick inserted in the center comes out clean. Rotate cake half way through baking if needed for even baking.
Let cake cool completely before frosting.
Frosting
In a stand mixer with the whisk attachment or with hand beaters, beat the heavy cream until soft peaks form, about 1-2 minutes.
Add the powdered sugar and vanilla extract and beat until stiff peaks form, takes only a minute.
Remove 1½ cups (about half) of the frosting and set it aside.
Place the remaining frosting in the center of the cooled cake and evenly spread it out to the edges of the cake.
Working on the cake horizontally, place the blueberries in the upper left corner in 7 rows by 7 columns.
Place the sliced strawberries in rows, overlapping the ends. Leave about 2 inches in between each row.
Take the frosting that was set aside and add it to a piping bag with a large tip (or a zip top bag with the corner cut works too) and pipe the white stripes between the strawberries.