Recipe by
Sophia Martinez
Pastry enthusiast and home baker. I test every recipe at least 3 times before publishing so you get reliable results every time. Learn more about Sophia →
That smell warm strawberries and rhubarb bubbling under a golden, buttery crust it hits you before the oven even opens. Strawberry Rhubarb Dump Cake is the kind of dessert that feels like it took effort but honestly couldn’t be simpler.
Spring always makes me want to bake something bright and fruity, especially when there’s a Mother’s Day table to fill. I’ve tested this one more times than I can count the trick is letting that rhubarb soften completely before pulling it out, so every bite is jammy, tender, and absolutely worth the wait.
Strawberry Rhubarb Dump Cake Cozy New Way to Make a Real Treat
Ingredients
Why You’ll Love This Recipe
Here’s the honest truth: this dessert delivers a bubbling, jammy fruit base with a golden, crackly butter crust and it asks almost nothing of you. No mixing bowls, no creaming butter, no fussy layers. It’s become my go-to when I need something beautiful on the table without spending hours in the kitchen, especially for a Mother’s Day brunch or a last-minute spring gathering.
- Ready to bake in just 10 minutes of prep
- Works with fresh or frozen fruit no thawing required
- Feeds a crowd straight from the pan
- That warm, caramelized fruit smell fills the whole kitchen
What You’ll Need
The ingredient list is beautifully short, and every item is easy to find at your regular grocery store. The strawberry gelatin powder is the secret layer here it deepens the fruit flavor and helps everything set into that luscious, jammy texture as it bakes.
- Rhubarb and strawberries form the tart-sweet fruit base
- Sugar (divided) sweetens both the fruit layer and the topping
- Cinnamon adds warmth or swap half for nutmeg if you like a spiced note
- Strawberry flavored gelatin powder boosts color and flavor
- Yellow or white cake mix creates the crisp, golden topping
- Sliced butter melts down through the dry mix as it bakes
- Water keeps the fruit from drying out underneath
How to Make Strawberry Rhubarb Dump Cake
The method is exactly as easy as the name suggests. Preheat your oven to 350°F and lightly grease a 9×13-inch baking dish before you start.
- Spread the chopped rhubarb and strawberries evenly across the bottom of the dish.
- Sprinkle half the sugar over the fruit, followed by the cinnamon and the strawberry gelatin powder.
- Pour the water evenly over everything.
- Sprinkle the dry cake mix straight from the box over the top do not stir.
- Scatter the remaining sugar over the cake mix layer.
- Lay the sliced butter in a single layer across the top, covering as much surface as possible.
- Bake uncovered for 45–50 minutes, until the top is golden and the fruit is bubbling at the edges.
Pro Tip: Letting the cake rest for 10 minutes before serving allows the fruit base to set just enough so it scoops cleanly and holds its shape in the bowl.
Can You Make Strawberry Rhubarb Dump Cake Ahead of Time?
Yes and it actually gets better as it sits. The fruit layer thickens slightly once it cools, making leftovers even more scoopable the next day.
- Bake up to one day ahead and store loosely covered at room temperature
- Refrigerate for up to 4 days reheat individual servings in the microwave for 30–45 seconds
- Freeze baked portions in airtight containers for up to 2 months
Easy Swaps and Simple Tweaks
The recipe is forgiving and flexible feel free to make it your own depending on what you have on hand.
- Swap yellow cake mix for white cake mix for a slightly lighter topping
- Use frozen strawberries and rhubarb if fresh isn’t available no need to thaw first
- Replace cinnamon with a half-and-half cinnamon and nutmeg blend for a warmer spice profile
- Serve warm with a scoop of vanilla ice cream or a dollop of whipped cream for a truly indulgent finish
My Long-Awaited Strawberry Rhubarb Dump Cake Finally Got It Right
This Strawberry Rhubarb Dump Cake humbled me more than once. The first two batches came out soupy, and one memorable Sunday I served what can only be described as warm fruit soup to my family. After a lot of testing and one very honest daughter, I finally landed on a version that is jammy, golden, and absolutely worth every failed attempt.
FAQs ( Strawberry Rhubarb Dump Cake )
Can I use frozen rhubarb in strawberry rhubarb dump cake?
Yes, this recipe works with fresh or frozen fruit. No thawing is required before assembling.
Do I need to sweeten rhubarb before adding to this cake?
The recipe uses 3/4 cup of sugar divided over the fruit layers, so no separate pre-sweetening step is needed.
What cake mix goes with this dessert?
A standard 15 oz yellow or white cake mix works perfectly here. Either option complements the fruit and gelatin layer well.
Can I substitute rhubarb in this recipe?
The recipe is built around rhubarb as a core ingredient. Substituting it will change the tart flavor balance the dish is known for.
How long do you bake this cake?
This easy dump-style treat bakes for 50 minutes. Check your recipe card for the correct oven temperature.
A Little Cake That Earns Its Place at Every Spring Table
This Strawberry Rhubarb Dump Cake bakes up golden and bubbling in under an hour and honestly, it smells like the best kind of spring afternoon you can imagine.
Don’t skip that 10-minute rest before you scoop it makes all the difference for a clean, jammy serving. A scoop of vanilla ice cream on top turns this into something truly memorable, and if you want a little extra warmth, that cinnamon-nutmeg swap is one of my favorite small-kitchen tricks. Leftovers reheat beautifully in the microwave, though there’s rarely much left by morning.
Did you grow up eating rhubarb desserts this time of year? I’d love to hear about it in the comments. This one was made for Mother’s Day tables, neighborhood potlucks, and any spring moment that deserves something warm and homemade at the center of it. Share it with someone who’d love it, and remember some occasions just need a dessert that feels extra special.
