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1
Preheat oven to 350F.
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2
Butter and flour two 9-inch-diameter cake pans with 1 1/2-inch-high sides.
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3
Sift sifted flour, cocoa powder, baking powder, baking soda, and salt into medium bowl.
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4
Whisk buttermilk, food coloring, vinegar, and vanilla in small bowl to blend.
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5
Using electric mixer, beat sugar and butter in large bowl until well blended.
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6
Add eggs 1 at a time, beating until well blended after each addition.
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7
Beat in dry ingredients in 4 additions alternately with buttermilk mixture in 3 additions.
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8
Divide batter between prepared pans.
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9
Bake cakes until tester inserted into center comes out clean, about 27 minutes.
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10
Cool in pans on racks 10 minutes.
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11
Turn cakes out onto racks; cool completely.
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12
Beat cream cheese and butter in large bowl until smooth.
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13
Beat in vanilla.
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14
Add powdered sugar and beat until smooth.
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15
Place 1 cake layer, flat side up, on platter.
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16
Spread 1 cup frosting over top of cake.
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17
Arrange 1 basket raspberries and 1/2 basket blueberries atop frosting, pressing lightly to adhere.
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18
Top with second cake layer, flat side down.
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19
Spread remaining frosting over top and sides of cake.
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20
Arrange remaining berries decoratively over top of cake.
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21
(Can be made 1 day ahead.
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22
Cover and refrigerate.
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23
Let stand at room temperature 1 hour before serving.)