Absolutely! Adding fruit to your cake mix is a fantastic way to infuse natural sweetness and moisture into your cake and add bursts of flavor and color. Fresh, frozen, or canned fruits like berries, apples, pears, and, of course, peaches, work wonderfully. Just be mindful of the moisture content; extra juicy fruits may require a slight reduction in other liquid ingredients to balance the batter. If using frozen fruit, consider tossing them in a small amount of flour before adding to the mix; this helps to prevent them from sinking to the bottom of the cake as it bakes. Whether you fold them into the batter or arrange them on top for a beautiful finish, fruits can elevate your cake to a whole new level of deliciousness.