Creating this incredible Banana Split Dump Cake is simple with the following steps:

1. Preheat Oven: Preheat your oven to 350°F (175°C). Grease a 9×13-inch baking dish with non-stick spray or butter.

2. Layer the Pineapple: Pour the crushed pineapple, with its juice, into the bottom of the prepared baking dish, spreading it evenly.

3. Add Bananas: Layer the sliced bananas over the pineapple, ensuring they cover the entire surface.

4. Sprinkle Nuts: If using, sprinkle the chopped walnuts or pecans evenly over the bananas.

5. Add Cake Mix: Evenly sprinkle the entire box of yellow cake mix over the layers in the pan. Do not stir or mix; just let it be a dry layer.

6. Add Chocolate Chips: Distribute the chocolate chips evenly over the cake mix layer.

7. Add Coconut: If using, sprinkle the shredded coconut over the chocolate chips.

8. Pour Butter: Drizzle the melted butter over the entire surface, ensuring that all areas are covered.

9. Bake: Place the baking dish in the preheated oven and bake for 40-45 minutes or until the top is golden brown and bubbly.

10. Cool: Remove from the oven and allow it to cool for about 10-15 minutes before serving.