Red Velvet Cake with Raspberries and Blueberries

Name: Red Velvet Cake with Raspberries and Blueberries
Ingredients: 2 1/4 cups sifted cake flour (sifted, then measured); 2 tablespoons unsweetened cocoa powder; 1 teaspoon baking powder; 1 teaspoon baking soda; 1 /2 teaspoon salt; 1 cup buttermilk; 1 tablespoon red food coloring; 1 teaspoon distilled white vinegar; 1 teaspoon vanilla extract; 1 1/2 cups sugar; 1 /2 cup (1 stick) unsalted butter, room temperature; 2 large eggs; 2 8-ounce packages cream cheese, room temperature; 1 tablespoon vanilla extract; 2 1/2 cups powdered sugar; 3 1/2-pint baskets fresh raspberries; 3 1/2-pint baskets fresh blueberries