American Flag Cake

Name: American Flag Cake
Prep time: 1 h
Cook time: 45 min
Total time: 1 h 45 min
Cuisine: American
Ingredients: 8 tablespoons butter, room temperature; 1 1/4 cups sugar; 2 eggs, room temperature; 1 teaspoon vanilla extract; 1 1/2 cups cake flour, sifted; 1 teaspoon baking powder; Salt; 3/4 cup buttermilk, room temperature; 4 sticks softened unsalted butter; 8 cups sifted powdered sugar; 1 tablespoon vanilla extract; 1/3 cup heavy cream