It doesn't get much easier than this five-ingredient dump cake. Just dump cherry pie filling, crushed pineapple, yellow cake mix, walnuts, and butter in a 9x13 baking dish and let the oven do all the work.
1 (21 ounce) can cherry pie filling
2 (8 ounce) cans crushed pineapple in 100% juice, undrained
1 (15.25 ounce) package yellow cake mix
2 cups chopped walnuts
¾ cup unsalted butter, melted
Preheat the oven to 350 degrees F (175 degrees C). Stir cherry pie filling and crushed pineapple together in a 9x13-inch pan and spread in an even layer.
Sprinkle dry cake mix evenly over pineapple and cherry mixture.
Sprinkle walnuts over cake mix; drizzle butter on top, making sure minimal dry spots remain.
Bake in the preheated oven until golden brown on top, about 35 to 40 minutes.