You'll Need: 9 inch cake pan  Maple Apple Upside Down Skillet Cake Ingredients Apples: 2 medium apples, peeled and sliced into ½-inch thick wedges ½ cup pure maple syrup 4 tablespoons butter ½ cup firmly packed light brown sugar ¼ teaspoon ground cinnamon Cake: 1½ cups all-purpose flour 1 teaspoon baking soda 1 teaspoon