Name: Blackberry Dump Cake
Prep time: 5 min
Cook time: 30 min
Total time: 35 min
Yield: 12 servings
Cuisine: American

Cake Mix Recipes Verified

February 6, 2026

Blackberry Dump Cake is the perfect way to use up all the lush berries that you have in the summer months. It makes an old fashioned dessert that perfumes the air as it bakes. Perfect for picnics or get togethers. The blackberry dump cake is so quick, easy and incredibly delicious. Use fresh or frozen berries or even pie filling. They will all work great and create an amazing cake with juicy berries and a crispy top layer that calls out for a scoop of your favorite ice cream to finish.

From the Cook

1/8

Blackberry Dump Cake

Cake Mix Recipes Verified

Ingredients

WarningMilk and 5 other allergens identified

Instructions

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Instructions

Preheat oven to 350 degrees

Prepare a 13×9 pan with nonstick spray

In a bowl mix together berries, sugar, and cinnamon

Spread in bottom of pan

Sprinkle on ½ of the rolled oats, then cake mix, then remaining oats

Shave cold butter or pour melted butter evenly over the top

Bake for about 30 minutes until bubbly and golden

Serve with ice cream if desired and enjoy!

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Tips & Tricks (5)

Berry Moisture Magic 💧
If using frozen blackberries, do not thaw them first to prevent excess liquid that could make your cake soggy. Frozen berries will release just the right amount of juice during baking.
Butter Distribution Technique 🧈
Cut cold butter into thin, uniform slices and distribute evenly across the top of the cake mix for more consistent melting and a perfectly crisp, golden topping.
Oat Crunch Enhancement 🥣
Toast the rolled oats in a dry skillet for 3-4 minutes before adding them to the recipe to intensify their nutty flavor and improve their crispy texture.
Acid Balance Trick 🍋
If your blackberries are particularly sweet, add a tablespoon of lemon juice to the fruit layer to brighten the flavor and provide a subtle tartness.
Serving Temperature Secret 🍨
Let the dump cake cool for 15-20 minutes after baking to allow the fruit layer to set, which creates cleaner slices and prevents burning your mouth.