This old-fashioned peach dump cake is quick and easy dessert you'll absolutely love. A dump cake is a cake made by dumping the ingredients, which typically include store-bought cake mix, directly in a pan before baking. For this recipe, we used canned peaches along with cinnamon and cake mix to create a bubbly and warm dessert. It's the best when served fresh and hot out of the oven with cold vanilla ice cream scooped on top.