Follow these simple steps to create your Rhubarb Dump Cake:

1. Preheat the Oven: Set your oven to 350°F (175°C) to prepare for baking.
2. Prepare the Baking Dish: Grease a 9×13 inch baking dish with butter or cooking spray.
3. Prepare the Rhubarb: In a large bowl, combine the chopped rhubarb and granulated sugar. Mix them well and let them sit for about 10 minutes to release some juice.
4. Spread the Rhubarb: Layer the sugared rhubarb evenly across the bottom of the greased baking dish.
5. Add Cake Mix: Sprinkle the dry yellow cake mix evenly over the rhubarb layer. Do not stir; simply distribute it as evenly as possible.
6. Mix Wet Ingredients: In a separate bowl, whisk together the melted butter, water, vanilla extract, and almond extract (if using).
7. Pour Mixture: Pour the liquid mixture over the cake mix layer, ensuring even coverage.
8. Add Nuts (Optional): If you like, sprinkle chopped nuts over the top for added crunch.
9. Bake: Place your baking dish in the preheated oven. Bake for 30-35 minutes or until the top is golden brown and a toothpick inserted in the center comes out clean.
10. Cool: Once baked, remove from the oven and let the cake cool slightly, about 10-15 minutes.
11. Serve: Cut into squares and serve warm, optionally topped with ice cream or whipped cream.

Following these steps will allow you to create your Rhubarb Dump Cake with ease and enjoyment.