Fourth of July Cake

INGREDIENTS

• FOR THE CAKE:
• 2-1/4 sticks Unsalted Butter
• 3 cups Sugar
• 6 whole Eggs
• 1 cup Sour Cream (Not Low Fat)
• 1-1/2 teaspoon Vanilla
• 3 cups Flour, Sifted
• 1/3 cup Cornstarch
• 1 teaspoon Kosher Salt (Use 3/4 Teaspoon Regular Salt If Kosher Salt Is Not Available)
• 1 teaspoon Baking Soda
• _____
• FROSTING
• 1-1/2 pound Cream Cheese (3 - 8oz. Packages, Not Low Fat)
• 1 pound Unsalted Butter (4 Sticks)
• 1 pound Powdered Sugar
• 1/2 pint Blueberries
• 2 pints Raspberries (Wash And Pat Dry)