Step 1

Preheat oven to 350 degrees F. Coat a 9- x 13-inch baking dish with cooking spray.

Step 2

Combine pie filling and pineapple with liquid in prepared baking dish; mix well.

Step 3

In a medium bowl, combine cake mix and cinnamon. Sprinkle dry cake mixture evenly over fruit. Top with walnuts and drizzle with butter.

Step 4

Bake 45 to 50 minutes, or until golden brown and bubbly. Serve warm or cold.