Enjoy this easy and delicious Strawberry Rhubarb Dump Cake recipe! Made with fresh or frozen fruit, cake mix, and minimal prep, it's the perfect quick dessert. Great for spring and summer picnics, potlucks, or any gathering!
Place the chopped rhubarb evenly in an ungreased 9" x 13" baking pan.
Mix the sugar and ground cinnamon (or a combo of ground cinnamon and nutmeg). Take out or reserve about 1/4 cup of the sugar and spice combo. Sprinkle the rest of the sugar all over the rhubarb.
Scatter the chopped strawberries over the rhubarb. Sprinkle with the remaining 1/4 cup of sugar.
Next, sprinkle the strawberry gelatin powder on top of the sugar mixture.
Sprinkle the cake mix on top of the gelatin powder.
Distribute the sliced butter on top of the cake mix. Slowly pour the water all over.
Bake in the preheated oven for 50-55 minutes, or until the top is set and browned, and the fruit mixture is bubbly around the edges. Allow the dump cake to cool for a few minutes before serving. This can be baked a day ahead. Serve warmed up or at room temperature with ice cream, if desired.