Preheat your oven to 350°F (175°C). This ensures that your cake bakes evenly and rises perfectly.
Grease your 9x13-inch baking dish lightly with cooking spray or butter to prevent sticking.
Open the can of cherry pie filling and spread it evenly across the bottom of the prepared baking dish.
Pour the crushed pineapple, along with its juice, over the cherry filling. This adds a beautiful fruity layer and moisture to the cake.
Take the yellow cake mix and sprinkle it evenly over the fruit layers. Make sure to cover the entire surface for a uniform bake.
Sprinkle the chopped walnuts (or your choice of nuts) over the cake mix layer. This will provide a delightful crunch to the topping.
Drizzle the melted butter evenly over the top. This will help the cake mix to brown and form a delicious crust.
Place the baking dish in the preheated oven and bake for 45-50 minutes, or until the top is golden brown and bubbly. You'll know it’s done when the edges start to crisp up.
Once baked, remove from the oven and allow it to cool for a few minutes. Serve warm, perhaps with a scoop of vanilla ice cream or a dollop of whipped cream!