Blackberry buttermilk cake DessertEasy1 h 45 m Send this recipe to a friend Print this page Ask a question to the author Post your photo of this recipe Ingredients 8 3/4 cup (1-1/2 sticks) unsalted butter, room temperature, plus more for pan and parchment 2-1/3 cups cake flour (sifted, then measured) plus more for pan 2-1/2 cups (10 ounces) fresh blackberries 1/4 cup plus 1-1/3 cups sugar 1-1/2 teaspoons baking powder 3/4 teaspoon salt 1/2 teaspoon baking soda 3 large eggs, room temperature 2 teaspoons vanilla extract 1-1/2 teaspoons finely grated orange zest 1 cup well-shaken buttermilk Confectioner' sugar, for dusting View the directions