Easy Blackberry Crumble Cake Recipe - Allrecipes.com
Easy Blackberry Crumble Cake Recipe
  • READY IN 45 mins

Easy Blackberry Crumble Cake

Recipe by  

"I came up with this recipe when I only had a cup of blackberries to use up. The end result was delicious!"

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Ingredients Edit and Save

Original recipe makes 8 servings Change Servings
  • PREP

    15 mins
  • COOK

    30 mins

    45 mins


  1. Preheat oven to 350 degrees F (175 degrees C). Butter a 9x12-inch baking dish.
  2. Stir blackberries and 1/4 cup white sugar together in a bowl.
  3. Mix oats, brown sugar, and cinnamon together in a separate bowl.
  4. Mix flour, 3/4 cup white sugar, salt, and baking powder together in a third bowl. Add milk to flour mixture; mix well. Pour batter into prepared baking dish. Top with blackberry mixture; sprinkle oat mixture over blackberries. Top oat mixture with butter chunks.
  5. Bake in the preheated oven until bubbling, about 30 minutes.
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Reviews More Reviews

Most Helpful Positive Review
Mar 24, 2013

The other reviewer was right, the proportions for this were WAY off! however, with a few altercations if is FABULOUS!! I used an 8.5x11 inch pan, and there's no way 1 cup of blackberries would be enough for even that. I used two medium tubs (12oz apiece) of blackberries, which means I also doubled the sugar (it's still early in the season though, so my berries were still pretty tart; it needed it) mixed with them. The bottom "crust" batter was very thick, almost pastelike, even though I added about 3/4 cup of milk. It was still delicious though, just saying, you WILL need more than 1/4 cup of milk. I also like a lot of crumble so I doubled the oats and brown sugar mixture. The bottom dough wasn't even close to done at 30 minutes, so I had to put it back in for another 20 minutes. I think next time I'll try it at 375 or maybe even 400, as the top wasn't very crispy, either. I shaved a cold stick of butter to lay on top of the crumble. Now, that is a lot of altercations, but it made a hearty cobbler and the taste was PHENOMENAL! I especially like the addition of oats, which makes it more crumbly instead of cakey, like some of the other recipes I'd looked at. We ate it with scoops of ice cream. It's pretty rich, so I wouldn't serve yourself too much, although it's tempting! :) Enjoy! I added a picture since there was none (white bowl with a scoop of ice cream added).

Most Helpful Critical Review
Sep 22, 2012

I loved the basic concept of this cake but the ingredient amounts are way off for a 9x13 pan. I had to double the milk to get a reasonable batter and I also doubled the blackberries. Still a very thin cake - I'd make it again but in a 9x9 pan. The topping is lovely.

Feb 15, 2013

This is an awesome recipe! I increased the milk to 1/2 cup and used a 9x9 pan.

Aug 27, 2013

This recipe doesn't match up. I changed it a little as a went but this is the first time ive made this, so the bottom ended up gummy because there wasn't enough milk. im sure if you changed the recipe it would be delicious though! advice: read other reviews before starting

Jan 27, 2015

Pretty good. I used cranberries instead of blackberries--what I had--but quadrupled the suagar as cranberries are much tarter than blackberries. I also heeded the reviews and baked this in an 8x8 pan--made for a thick batter and cobbler. Hubs thought this was okay and I did too. I liked the tartness of the cranberries, but I think blackberries or raspberries probably would be better. However, no reason to dock this recipe as a result. I think it was a nice cobbler. Thanks for the recipe!

Mar 21, 2014

Amazing and easy.

Feb 11, 2015

The ingredient measures were inaccurate and the end result was soggy and way-too-sweet.

Jul 02, 2014

I didn't read the reviews before I made this cake. I found that I needed way more milk that was stated in recipe and that a 9X13 pan seemed a little big. Now I know for next time. I have tons of wild blackberries so I know I'll try making this again.


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  • Calories
  • 256 kcal
  • 13%
  • Carbohydrates
  • 48.5 g
  • 16%
  • Cholesterol
  • 16 mg
  • 5%
  • Fat
  • 6.4 g
  • 10%
  • Fiber
  • 1.9 g
  • 8%
  • Protein
  • 2.6 g
  • 5%
  • Sodium
  • 398 mg
  • 16%

* Percent Daily Values are based on a 2,000 calorie diet.

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