The simplest peach dump cake just requires you to add your cut peaches to the bottom of a pan and pour dry yellow cake mix over the top along with solid slices of butter. The cold butter slowly ...

Stir together remaining 3/4 cup diced peaches, remaining 1/4 cup peach jam, and remaining 1 teaspoon lemon juice in a bowl; spread peach mixture on top of cake, leaving a 1- to 2-inch-wide border ...