Preheat your oven to 350°F (175°C).
Grease a 9×13-inch baking dish or use a 12-inch oven-safe skillet. Spread the lemon pie filling evenly across the bottom of the dish.
Sprinkle white chocolate chips over the lemon filling, followed by the cubed cream cheese.
Evenly cover everything with the lemon cake mix, ensuring all the filling is hidden.
Slice the butter into small pads and place them across the surface of the cake mix.
Bake for 1 hour, or until the top is golden and the filling is bubbling around the edges.
