Preheat your oven to 350°F (175°C). Grease a 9×13-inch baking pan.
Spread the lemon pie filling evenly across the bottom of the pan.
Drop pieces of softened cream cheese over the lemon layer.
Sprinkle the dry yellow cake mix evenly on top.
Lay slices of butter evenly over the cake mix.
Bake for 45–50 minutes, until the top is golden and bubbly.
