Homemade Oreos Ingredients For the chocolate wafers: 1 1/4 cups all-purpose flour 1/2 cup unsweetened Dutch process cocoa* 1 teaspoon baking soda 1/4 teaspoon baking powder 1/4 teaspoon salt 1 to 1 1/2 cups sugar** 1/2 cup plus 2 tablespoons (1 1/4 sticks) room-temperature, unsalted butter 1 large egg For the filling: 1/4 cup