This Rhubarb Dump Cake is a simple, comforting dessert that requires minimal effort. Just dump ingredients into a baking dish, bake, and enjoy a delicious cakey-cobbler-like treat with tart rhubarb.
You don't even really need to grease the baking dish because of all that wonderful butter, but a quick spray won't hurt if you're worried about sticking.
Try to drizzle the melted butter as evenly as possible over the dry cake mix. This helps the cake mix absorb the fat and get that lovely texture.
Dice the rhubarb into roughly ½ to 1-inch pieces.
Do not stir the ingredients before baking; the magic happens when they layer.
While delicious warm from the oven, letting it sit for 10-15 minutes helps it set up slightly before serving.
Store leftovers covered in the refrigerator for 3-4 days. Reheat gently in the microwave.
Serving suggestion: Serve warm with vanilla ice cream or whipped cream.
Rhubarb is quite tart; reducing the sugar too much may result in an overly sour dessert.