In a large mixing bowl, combine cake mix, butter, and 1 egg. Mix ingredients to a crumbly consistency. Separate ½ cup of crumble for topping.
Spray a 9x13 glass dish with cooking oil. Press remaining crumble into base of dish.
Bake at 350 degrees for 10 minutes. As the crust bakes, slice peaches into 1 inch pieces.
Beat cream cheese, sugar, 1 egg, and vanilla until creamy. Layer peaches on top of baked crust, then spread cream cheese mixture on top of the peaches. Top with reserved crumbs and bake for 30 minutes. Allow to cool for 30 additional minutes and serve with home churned vanilla ice cream.