Red Velvet Cake with Berries

Name: Red Velvet Cake with Berries
Ingredients: 2¼ cups (214 grams) sifted cake flour (sifted, then measured); 2 tablespoons (15 grams) unsweetened cocoa powder; 1 teaspoon baking soda; 1 teaspoon baking powder; ½ teaspoon salt; 1 cup (237 ml) buttermilk; 2 tablespoons (29 grams) sour cream; 1 tablespoon red food coloring; 2 teaspoons vanilla extract; 1 teaspoon distilled white vinegar; 1½ cups (338 grams) sugar; 8 tablespoons (115 grams) unsalted butter, room temperature; 2 large eggs, room temperature; 3 8-ounce packages (680 grams) cream cheese, room temperature; 12 tablespoons (338 grams) unsalted butter, room temperature; 5 teaspoons vanilla extract (use clear vanilla for whiter frosting); 3¾ cups (415 grams) confectioners’ sugar, sifted; 3½-pint baskets (510 grams) fresh raspberries; 3½-pint baskets (455 grans) fresh blueberries