INGREDIENTS
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[ 9 tablespoons cocoa powder + 1 1/2 cup cake flour (or all purpose flour, sifted) + 1/2 teaspoon salt + 1 teaspoon baking soda + 1/4 teaspoon baking powder + 1 stick (1/2 cup) unsalted butter + 1 1/2 cup granulated sugar + 2 large eggs + 1/2 cup str