Easy Apple Rhubarb Dump Cake (4 Ingredients, No Fuss!)
This incredibly easy Apple Rhubarb Dump Cake comes together with just 4 ingredients and delivers a bubbling, golden dessert that tastes like you spent hours in the kitchen. Perfect for using fresh or frozen rhubarb!
The Easiest Apple Rhubarb Dump Cake You Will Ever Make
If you have a bag of rhubarb lurking in your freezer and a can of apple pie filling in your pantry, you are already most of the way to one of the most satisfying, crowd-pleasing desserts you can make. This Apple Rhubarb Dump Cake is the kind of recipe that makes you look like a rockstar baker with almost zero effort. It is warm, bubbling, golden on top, and ready in under an hour.
The tartness of the rhubarb cuts right through the sweetness of the apple filling, and together they create that perfect old-fashioned fruit dessert flavor that tastes like something your grandmother would have pulled out of the oven on a Sunday afternoon. If you have been searching for easy 4 ingredient recipes for dessert, this one genuinely delivers.
Getting this recipe right comes down to good ingredients and the right baking dish. A heavy ceramic or glass 9x13 pan distributes heat evenly and gives you that beautiful bubbling edge without burning the bottom. The quality of your butter matters too since it melts down into the cake mix to create that irresistible golden crust.
Fresh, Frozen, or Canned Rhubarb? All Three Work Here
One of the best things about this recipe is how flexible it is. Fresh rhubarb from the garden or farmers market gives you the most vibrant flavor. Recipes using frozen rhubarb are equally reliable, just layer it in straight from the bag. No thawing needed. The oven does all the work.
If you happen to have your own canned rhubarb, this is a perfect recipe to use it. Just drain off most of the liquid before layering so the bottom does not get too soggy. A lightly drained jar of home-canned rhubarb under that apple filling is honestly a dream combination.
Chef's Tip: If your rhubarb is very tart, sprinkle a small handful of sugar directly over it before adding the apple filling. Rhubarb candy fans will love a little extra sweetness in every bite.
Why This Is the Best Rhubarb Dump Cake Recipe
There are dozens of rhubarb dump cake recipes floating around, but a few things make this version stand out:
- Apple pie filling adds instant depth and sweetness without any extra prep.
- The yellow cake mix creates a buttery, crumbly topping that is far more satisfying than a plain crumble.
- It works beautifully as a rhubarb cake with cake mix recipe, meaning even beginner bakers can nail it.
- It uses pantry staples, making it a go-to in the tradition of classic dump cake recipes, easy and reliable.
For fans of apple rhubarb cake recipes, this is the lazy-day version you will reach for again and again. It has all the flavor of a proper rhubarb cake with a fraction of the effort.
Tips for a Golden, Crispy Top
The biggest key to a beautiful dump cake top is butter coverage. Slice your butter into thin, even pats and do your best to cover the entire surface of the dry cake mix. Any dry patches that are not touched by melting butter will stay powdery and floury, which nobody wants.
Some bakers like to melt the butter first and drizzle it over the top. That works too and gives even more consistent coverage. Either way, do not stir. The whole magic of a dump cake is the layering.
Ready to make this yourself? Here is the full recipe:
Easy Apple Rhubarb Dump Cake (4 Ingredients, No Fuss!)
This incredibly easy Apple Rhubarb Dump Cake comes together with just 4 ingredients and delivers a bubbling, golden dessert that tastes like you spent hours in the kitchen. Perfect for using fresh or frozen rhubarb!
Ingredients
- 3 cups rhubarb, fresh or frozen, cut into 0.5-inch pieces
- 21 oz apple pie filling, one standard can; canned rhubarb filling works great too
- 15 1/4 oz yellow cake mix, one standard box, dry and unprepared
- 1/2 cup unsalted butter, sliced into thin pats
- 1/4 cup granulated sugar, optional, to sweeten tart rhubarb
Instruction
Preheat your oven to 350 degrees F (175 degrees C). Lightly grease a 9x13 inch baking dish.
Spread the rhubarb pieces evenly across the bottom of the prepared baking dish. If using frozen rhubarb, there is no need to thaw it first.
If your rhubarb is especially tart, sprinkle the optional granulated sugar evenly over the rhubarb layer.
Pour the apple pie filling over the rhubarb and gently spread it into an even layer.
Open the dry cake mix box and sprinkle the dry cake mix evenly over the fruit layer. Do not stir.
Lay the thin butter pats in a single layer across the top of the dry cake mix, covering as much surface area as possible.
Bake uncovered for 45 to 55 minutes, until the top is golden brown and the fruit filling is bubbling around the edges.
Remove from the oven and let cool for at least 10 minutes before serving. Serve warm with vanilla ice cream or whipped cream.
Equipment
- 9x13 inch baking dish
- Cutting board and knife
- Measuring cups
Notes
Serving and Storing Your Apple Rhubarb Dump Cake
Serve this warm straight from the oven with a generous scoop of vanilla ice cream melting over the top. A dollop of freshly whipped cream or even a spoonful of rhubarb marshmallow topping would be a fun and creative twist for a party spread.
Leftovers reheat beautifully and honestly taste even better the next day once the flavors have had time to meld together. Cover tightly and refrigerate for up to 4 days. This also makes an excellent make-ahead dessert for holidays, potlucks, or any time you want something homemade without spending hours in the kitchen.
