INGREDIENTS
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Cake: 1/2 cup cocoa 1 oz. unsweetened chocolate 1 cup boiling water 1 3/4 cups plus 2 tablespoons cake flour 1/2 teaspoon salt 1 teaspoon baking soda 1 1/2 cups brown sugar 1 cup butter 1/4 cup sour cream 2 eggs 2 egg yolks Peanut Butter Buttercream