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Home » Baked Desserts

Easy Triple Berry Crumble With Oats

Published: May 25, 2023 · Modified: Jul 15, 2024 by Zoha · This post may contain affiliate links · 16 Comments

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It's summer season, which means super markets are filled with beautiful, juicy berries, and it is the perfect time to make this easy triple berry crumble with oats!

This is my go to last minute dessert for summer hosting plans (including Memorial Day, which is just around the corner), because:

  • It comes together in under 1 hour with less than 10 minutes of active work
  • It takes very few ingredients which are likely already in your pantry
  • It is not too sweet (I don't add any sugar to the filling)
  • It has the perfect ratio of crumble to berries (i.e., lots of crispy crumble)!
  • It is actually kind of healthy! Seriously - full of fiber and not a lot of sugar. It's a win as far as desserts are concerned

If you're not a fan of berries, try my amazing Easy Peach Crumble instead!

triple berry crumble in a white casserole dish with golden crispy oat crumble topping and berries bubbling through it
berry crumble in a bowl with a crispy oat crumble and bubbling berries underneath
Jump to:
  • INGREDIENTS
  • HOW TO MAKE THE TRIPLE BERRY CRUMBLE
  • RELATED RECIPES
  • FREQUENTLY ASKED QUESTIONS
  • Easy Triple Berry Crumble With Oats

INGREDIENTS

Here's what you will need for this recipe:

Oat crumble topping:

  • All purpose flour
  • Old fashions rolled oats - I like to use Quaker
  • White sugar - you can also sub brown sugar
  • Salt
  • Cinnamon
  • Cold, cubed butter - make sure the butter is very cold straight from the fridge for best results

Berry filling:

  • Mixed berries - I used a mixture of raspberries, blackberries and blueberries, but you can also add strawberries. You can use fresh berries (washed and dried) or frozen berries, no need to thaw!
  • Cornstarch
  • Lemon juice
  • Salt
  • Note: I did not add sugar to the filling as I find berries are naturally sweet and the crumble is quite sweet, too! But you can add sugar here if you want, too
berry crumble in a bowl with a crispy oat crumble and bubbling berries underneath. Another bowl and dish seen in the background

HOW TO MAKE THE TRIPLE BERRY CRUMBLE

This crumble is extremely easy to make and takes less than 10 minutes of active work! Here's a quick video:

[adthrive-in-post-video-player video-id="9Z2icbwm" upload-date="2023-07-25T01:23:33.000Z" name="Easy Triple berry Crumble With Oats" description="How to make triple berry crumble" player-type="default" override-embed="default"]

First, preheat the oven to 375F (conventional) and brush some butter on the bottom of a 9x13" casserole / lasagna dish.

Now, prepare the oat crumble topping. Mix the flour, oats, sugar, cinnamon and salt in a bowl, and whisk to ensure there are no lumps. Add in the cold, cubed butter, and rub it in with your hands until the mixture resembles large bread crumbs. It's ok for there to be some large crumbs in there. Set aside the bowl.

dry ingredients for oat crumble topping mixed in a glass bowl
oat crumble topping prepare with butter in a glass bowl

Next, prepare the berry filling directly in the baking dish. Add the washed and dried berries, lemon juice, cornstarch and salt, and mix to combine.

mixing berries, cornstarch, lemon juice and salt in a casserole dish
freshly washed raspberries blueberries and blackberries in a casserole dish

Lastly, top the berry filling with the oat crumble topping made earlier, spreading it evenly. This recipe makes a thick crumble layer, which is exactly how I like it!

topping berry filling with oat crumble in a pan
triple berry oat crumble in a casserole dish, unbaked

Now just chuck into the oven and bake for about 40-45 minutes until the crumble topping is golden and crispy.

Serve the triple berry crumble while still warm. It is delicious with a scoop of vanilla ice cream or whipped cream!

baked oat berry crumble with a crispy golden topping and colorful berry filling bubbling through
a bowl with warm triple berry crumble, a crispy oat crumble topping, and a scoop of vanilla ice cream on top

RELATED RECIPES

Check out my other delicious summer recipes!

  • peach crumble in a cast iron skillet. The crumble is golden and crispy, topped with 3 scoops of whipped cream, and some of the crumble has been taken out to show the soft juicy peaches inside
    Easy Peach Crumble (Crisp)
  • slice of mango float on a small plate with a fork taking out a bite. the float has layers of biscoff cookies, cream and mangoes
    Easy Mango Float
  • slices of blueberry coffee cake placed sideways next to each other to reveal the layers of buttery crumble and soft cake with lots of blueberries instead. Close up of one slice
    Blueberry Coffee Cake
  • a key lime pie bar on a small plate with a fork taking out a bite and resting on the side. the bar has a graham cracker crust, a silky key lime interior, and whipped cream on top; decorated with lime zest
    BEST Key Lime Pie Bars

FREQUENTLY ASKED QUESTIONS

Can I substitute white sugar with brown sugar?

Yes, you can substitute the white sugar in the crumble topping with brown sugar.

Can I prepare the berry crumble ahead of time?

I suggest baking the crumble fresh as it is best when warm. To prepare ahead of time, you can prepare the crumble topping separately, and assemble right before baking. I don't necessarily recommend preparing the whole thing ahead of time as the berries will release a lot of water.

Can berry crumble be frozen?

Yes, you can freeze the berry crumble both before and after baking it! If freezing beforehand, I suggest baking straight from the freezer and simply adding 5 minutes to the baking time. If freezing baked, I suggest warming it up in the oven, too. Note that a crumble is best freshly baked, so if you freeze it after baking, the textures may not be absolutely perfect.

Can I use this recipe for a different fruit?

Yes! You can easily use this recipe for any kind of fruit crumble. If you are not a fan of berries, you can make an apple crumble (with thinly sliced apples) or a peach crumble (with chopped peaches). It will be delicious no matter what.

Now, without further ado, let's dive in, shall we!?

If you enjoyed this recipe and want more easy dessert recipes, definitely check out the following, too:

  • Super moist, easy chocolate cake which comes together in less than 1 hour!
  • Mango Chantilly swiss roll perfect for this mango season
  • Easy chocolate mousse cake which is somewhere in between ice cream and cake
Print
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berry crumble in a bowl with a crispy oat crumble and bubbling berries underneath. topped with a scoop of vanilla icecream

Easy Triple Berry Crumble With Oats


5 Stars 4 Stars 3 Stars 2 Stars 1 Star

4.9 from 7 reviews

  • Author: Zoha
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Description

An easy and delicious triple berry crumble with a crispy oat topping which comes together in under an hour!


Ingredients

Oat crumble topping:

  • ⅔ cup flour
  • ⅔ cup oats
  • ¾ cup sugar
  • ½ to 1 teaspoon cinnamon
  • ½ tsp salt
  • ½ cup butter

Triple Berry filling:

  • 3-4 cups mixed berries of choice (fresh or frozen, about 1 lb) - chop roughly if needed, although I didn't chop them
  • 1 tbsp cornstarch
  • 1 tbsp lemon juice
  • Pinch of salt

Instructions

  • Pre-heat oven to 375F and brush butter on the bottom of a 9x13" casserole dish (ceramic baking dish)
  • Mix the flour, oats, sugar, cinnamon and salt in a glass bowl and whisk to ensure there are no lumps. Add the cold cubed butter and rub it in with your hands until the mixture resembles large bread crumbs
  • Add the berries, cornstarch, lemon juice and salt in the casserole dish and mix until combined
  • Top the berries with the crumble, spreading evenly
  • Bake for 40-45 minutes until the crumble is golden and crispy
  • Serve warm, ideally with vanilla ice cream or cold whipped cream!

Did you make this recipe?

Leave a review and tag @bakewithzoha on Instagram!

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Comments

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  1. Elena says

    June 07, 2023 at 12:05 pm

    Really easy to make and very tasty ! Love it

    Reply
    • Zoha says

      June 07, 2023 at 12:13 pm

      Yay!!! Glad you liked it

      Reply
  2. Shirin Tanveer Sareshwala says

    June 10, 2023 at 12:09 pm

    I really like ur receipts and u r also very sweet.

    Reply
    • Zoha says

      June 21, 2023 at 12:23 pm

      Thank you so much, Shirin! <3

      Reply
  3. Yuliana says

    June 08, 2024 at 5:18 am

    Great recipe! Thank you for sharing

    Reply
    • Zoha says

      July 10, 2024 at 12:56 pm

      Thank YOU!!

      Reply
  4. Asma Amer says

    June 17, 2024 at 3:41 am

    Tried the recipe with peaches. Couldn’t get yummier. The best crumble I ever had.
    ❤️❤️❤️

    Reply
    • Zoha says

      July 10, 2024 at 12:42 pm

      I LOVE it with peaches!

      Reply
  5. annon says

    July 10, 2024 at 10:46 pm

    made for the first time for a dinner party and it was a big hit! people were even scraping the dish to get the last bits by the end.

    Reply
    • Zoha says

      July 15, 2024 at 6:04 pm

      Awww, how sweet is that! Thank you so much!

      Reply
  6. Daniella Steinmetz says

    September 22, 2024 at 9:44 pm

    I'm very excited to try this! which kind of oats should I use? we have rolled oats and instant oats in our pantry

    thank you!

    Reply
    • Daniella Steinmetz says

      September 22, 2024 at 9:48 pm

      nevermind I read the recipe again and it said rolled! 🙂

      Reply
  7. Sobia says

    November 25, 2024 at 10:07 pm

    Hi Zoha! So I already made apple crumble & peach crumble with this recipe at few dinners & brunch. But this time it was a dessert competition in our society and I made Tripple Berry Crumble, and guess who won the first prize 🙌🏻. Thank you for always giving us such hit recipes. Much love

    Reply
  8. David says

    December 24, 2024 at 4:13 pm

    Outstanding berry crumble! You had me at easy and thick crumble topping, but your direction to "chuck it into the oven" sealed the deal. I still chuckle when I refer to the recipe. Thank you for the yummy recipe and hearty laugh. Have a grand holiday and new year.

    Reply
girl (zoha) sitting with arm propped on counter, smiling at camera, muffins and brownies in front of her

Hi, I'm Zoha! Self taught home-baker, massive sweet tooth, lover of all things baked and content creator behind Bake With Zoha.

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