Barefoot Contessa’s Flag Cake Recipe

Ingredients

• 18 tbsp unsalted butter , at room temperature
• 3 cup sugar
• 6 eggs , large, at room temperature
• 1 cup sour cream , at room temperature
• ½ tsp pure vanilla extract
• 3 cups flour
• ⅓ cup cornstarch
• 1 tsp kosher salt
• 1 tsp baking soda

For Icing:

• 16 oz unsalted butter , at room temperature
• 8 oz cream cheese , at room temperature
• 3 ½ cups confectioners' sugar, sifted
• ½ tsp pure vanilla extract

To assemble:

• 1 cup blueberries
• 1 cup raspberries