Blueberry Pineapple Dump Cake

Spray cake pan with nonstick cooking spray. Dump blueberry pie filling on the bottom of the cake pan and spread evenly. Drain canned pineapple and distribute pineapple evenly over blueberries.

Sprinkle the yellow cake mix evenly over the blueberries and pineapple. Cut the butter into 1/4 inch pats and distribute evenly over cake mix.

Preheat oven to 350 degrees F and place cake pan on center rack for approximately 1 hour. When the top is golden brown it's done. The longer you leave it the crispier/crunchier the crust gets. It all depends on your taste. Let sit for at least 15 minutes to cool down.