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This blackberry crumble is perfectly sweet with an irresistible crumb topping! Slightly sour fresh blackberries are balanced out with a touch of sugar, then topped with a buttery oat crumble. Serve this blackberry crumble warm with a scoop of cold vanilla ice cream for a delicious summertime (or anytime) dessert!

blackberry crumble being spooned out of a baking dish

What Makes This Recipe So Good

It’s sweet, but not too sweet! This recipe has just the right amount of sugar to sweeten everything up while still allowing that delicious fresh blackberry flavor to shine through.
It’s the perfect way to enjoy blackberry season! Blackberries peak in the summer months, specifically June and July, and grow abundantly in many states. Visit your local farm for a few pints of their freshest blackberries and turn them into this delicious crumble before the season’s over!
It’s super easy to make! With just a few simple ingredients, you’ll toss together the filling, then the crumb topping and pile everything together in a baking dish. Transfer it all into the oven and allow the magic to happen! In 45 minutes you’ll return to a perfectly baked and incredibly delicious summertime dessert.

Key Ingredients

Blackberries – This delightful berry is juicy, sweet, and just a tiny bit tangy. Blackberries will taste a tad more sour earlier in the season (think May/June), then turn much sweeter towards the end of their growing season (July/August). Give your blackberries a taste before adding them to this recipe and adjust the amount of sugar as you see necessary. Super sweet blackberries? Try just 1/4 cup of sugar in the filling. Very sour blackberries? Then add a couple extra tablespoons of sugar!

Oats – Any type of oat will work in this blackberry crumble recipe. I used and prefer rolled oats, however quick oats, or even old-fashioned oats will bake up just as delicious! Rolled oats and old-fashioned oats are thicker and heartier than quick oats.

Chef’s Tips

Leave this blackberry crumble to cool for about 20 minutes before serving. The blackberry filling will thicken while it cools which is necessary for the integrity of this dessert. Feel free to wait even longer before serving, though I prefer this delicious dish slightly warm with a scoop of melty vanilla ice cream!
Make this recipe even easier on yourself by using the same bowl to mix together both the filling and the topping. There’s no need to use two separate bowls here when all ingredients end up in the same baking dish anyway!
Feel free to add in any other berries you’d like to this blackberry crumble! A handful of fresh blueberries or some fresh sliced strawberries would make delicious additions to this dessert recipe.

blackberry crumble in a baking dish with a spoon and vanilla ice cream

Other Delicious Fruit Dessert Recipes

Recipe By: Sam Guarnieri

5 from 1 vote

Blackberry Crumble

Prep 10

Cook 40

Total 50

8 servings

Equipment

Large bowl
9×13 baking dish

Ingredients

For the Blackberry Filling

▢ 8 cups fresh blackberries see Notes
▢ ½ cup sugar
▢ ¼ cup all-purpose flour

For the Crumb Topping

▢ 1 cup all-purpose flour
▢ ½ cup oats
▢ ¾ cup brown sugar
▢ 6 tablespoons butter melted

Instructions

Preheat oven to 375° Fahrenheit.
Mix all filling ingredients together in a large bowl, then transfer to a 9×13-inch baking dish.
Mix all crumb topping ingredients together in a bowl and spread mixture over top of the filling.
Bake for 40-45 minutes or until golden brown.

Blackberries: Be sure to use fresh, not frozen, blackberries in this recipe. If frozen is your only option, you’ll need to increase the flour to about 1/2 cup to compensate for the additional liquid they will release when baked.
Make it Vegan: Use vegan butter or coconut oil in place of the melted butter.
Make it Sugar-Free: Use your favorite sugar-free replacement, such as granular Swerve and Brown Swerve, in place of the sugar and brown sugar.

Recipe yields approximately 8 servings. Nutritional values shown are general guidelines and reflect information for 1 serving, not including vanilla ice cream. Actual macros may vary slightly depending on specific brands and types of ingredients used.

To determine the weight of one serving, prepare the recipe as instructed. Weigh the finished recipe, then divide the weight of the finished recipe (not including the weight of the container the food is in) by 8. Result will be the weight of one serving.

Approximate Information for One Serving

Serving Size: 1servingCalories: 354calProtein: 5gFat: 10gSaturated Fat: 6gTrans Fat: 1gCholesterol: 23mgSodium: 83mgPotassium: 303mgTotal Carbs: 65gFiber: 9gSugar: 40gNet Carbs: 56gVitamin A: 571IUVitamin C: 30mgCalcium: 67mgIron: 2mg