Blackberry Dump Cake is the one-pan dessert that uses either fresh blackberries or frozen blackberries, white cake mix, melted butter and a sprinkle of brown sugar.

Serve with your favorite ice cream or scoop on freshly whipped cream.
Here is why this recipe is amazing:
- A great way to use up extra frozen blackberries you have stored in the freezer.
- Made in one pan so minimal dished to wash!
- Crunchy, sweet cobbler-like topping over blackberries is a delicious dessert.
- An easy recipe that is a favorite with the whole family.
Ingredients needed:
- Blackberries – fresh, frozen or a combination of both
- Cake mix – I use yellow or white mix.
- Sugar – white sugar
- Water – yup you will need water for this recipe
- Butter – melted, I use salted butter but use unsalted if you prefer
- Brown Sugar - This is going to be sprinkled over the top before baking the cake
Here is a visual overview of the ingredients in the recipe. Scroll down to the recipe at the bottom for quantities.
How to make blackberry dump cake:
- Preheat oven to 350.
- Spray a 9×13 baking pan with non-stick pan spray.
- Spread the blackberries in the bottom of the prepared pan.
- Cover the berries evenly with sugar.
- Sprinkle the cake mix over the blackberries and sugar. Do not press or stir.
- Sprinkle the water over the cake mix to moisten it.
- Drizzle the melted butter over the remaining dry parts of the cake mix.
- Crumple the brown sugar over the cake before covering with foil.
- Cover with foil and bake for 45 minutes. Remove foil and bake an additional 15 minutes or until the top of the cake is golden brown and crunchy.
- Remove from the oven and serve with ice cream and/or whipped cream.
🧁 More Dump Cake Recipes
Blackberry Dump Cake -is the one-pan dessert that uses either fresh blackberries or frozen blackberries, white cake mix, melted butter and a sprinkle of brown sugar.
Rhubarb Dump Cake - without jello is the one-pan dessert that uses either fresh rhubarb or frozen rhubarb, yellow cake mix, melted butter and a sprinkle of cinnamon & nutmeg.
Pineapple dump cake - a box of cake mix, canned pineapple, butter and a bit of brown sugar baked in one pan for an easy dessert that is a crowd-pleaser.
Dump cake frequently asked questions, answers and tips:
Once the cake has been cooled, store it in the refrigerator covered with plastic wrap or foil.
I scoop a portion into a microwave safe bowl and microwave on high for 2 minute. Be careful for hot spots in the cake.
Sprinkle the cake mix over the sugared rhubarb and do not press it down. By pressing it you can form a crust and not allow the cake mix to fully hydrate leaving dry cake mix on the surface.
Blackberry Dump Cake
There is more to a recipe than just the recipe card. Frequently Asked Questions within the blog post that you may find helpful. Simply scroll back up to read them!
EQUIPMENT
Ingredients
- 4 cups Blackberries
- 1 box Cake mix
- 1 cup Sugar
- 1 cup Water
- ½ cup Butter melted
- ⅓ cup Brown Sugar
Instructions
- Preheat oven to 350.
- Spray a 9×13 baking pan with non-stick pan spray.
- Spread the blackberries in the bottom of the prepared pan.4 cups Blackberries
- Cover the berries evenly with sugar.1 cup Sugar
- Sprinkle the cake mix over the blackberries and sugar. Do not press or stir.1 box Cake mix
- Sprinkle the water over the cake mix to moisten it.1 cup Water
- Drizzle the melted butter over the remaining dry parts of the cake mix.½ cup Butter
- Crumple the brown sugar over the cake before covering with foil.⅓ cup Brown Sugar
- Cover with foil and bake for 45 minutes. Remove foil and bake an additional 15 minutes or until the top of the cake is golden brown and crunchy.
- Remove from the oven and serve with ice cream and/or whipped cream.
Notes
Nutrition
Nutrition Disclosure
Nutritional facts are estimates and are provided as a courtesy to the reader. Please utilize your own brand nutritional values to double check against our estimates. Nutritional values are calculated via a third party. Changing ingredients, amounts or cooking technique will alter the estimated nutritional calculations.
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Sarah Mock
Thanks for the note Jeanette. Did you use frozen or fresh fruit?
Sarah
Jeanette M. Spilman
this is very good, but I had to bake it about 25 minutes longer in order to be done.
Sarah Mock
Thank you Joseph!
Waiting is the hardest part. Thanks for the stars and I hope you come back for more recipes.
Joseph
Simply delicious! I followed the directions, but used yellow cake mix. It needed 20 mins uncovered in oven and it had a beautiful crust. It was difficult to wait till it cooled to eat it, we managed somehow. Very yummy and will be making it again.
Jan
Why is mine “loose, liquify-y” in the pan? I followed directions & recipe. I did use frozen mixed berries???