ingredients for the cake
2 1/4 cups (214 grams) sifted cake flour (sifted, then measured)
2 tablespoons (15 grams) unsweetened cocoa powder
1 teaspoon baking soda
1 teaspoon baking powder
1/2 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
1 1/2 cups (338 grams) sugar
8 tablespoons (115 grams) unsalted butter, room temperature
2 large eggs, room temperature
ingredients for the frosting
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)
3 3/4 cups (415 grams) confectioners' sugar, sifted
3 1/2-pint baskets (510 grams) fresh raspberries
3 1/2-pint baskets (455 grans) fresh blueberries
instructions for the cake
Preheat oven to 350*F. Grease two 9 inch round baking pans and line with parchment. Place in refrigerator.
Sift cake flour into medium bowl, measure 2 1/4 cups, then sift flour with cocoa powder, baking soda, baking powder, and salt into a large bowl.
Combine buttermilk, sour cream, food coloring, vanilla, and vinegar in a liquid measuring cup or small bowl. Whisk until smooth.
With a stand mixer fitted with the paddle attachment, cream the butter and sugar on medium speed until fluffy, about 4-5 minutes. Add eggs, one at a time, blending well after each addition, scraping down the bowl with a spatula as needed. Add the flour mixture in 4 batches, alternating with the buttermilk mixture, beginning and ending with the flour.
Divide batter between the cake pans. Bake 24-29 minutes, or until an inserted toothpick or cake tester comes out clean. Cool for ten minutes in the pans, then invert onto wire racks, remove parchment, and cool completely.
instructions for the frosting
With a stand mixer fitted with the paddle attachment, beat the cream cheese and butter until blended. Add the vanilla and beat to blend. Add confectioners' sugar and slowly mix to blend, then increase speed to medium for 1 minute.
Place one cake layer, bottom/flat side up onto a platter or cake stand. Frost top with a generous cup of cream cheese frosting, then top with 1 package of raspberries and 1/2 package blueberries, pressing lightly. Top with second cake layer, domed side up. Spread remaining frosting over top and sides of cake. Arrange berries decoratively on the top.
Store cake covered in refrigerator (can make the day before - let stand 1 hour before serving). If desired, dust with confectioners' sugar before cutting and serving.
recipe adapted from Bon Appetit