Apple and Blueberry Crumble

Apple and blueberry crumble is the next dessert you never knew you needed. With apples, blueberries, and an oatmeal cookie top, you’ll want to make this one over and over again. It’s light and bursting with fruit flavour that will have you and anyone you share it with wanting seconds.  

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apple and blueberry crumble

What is an apple and blueberry crumble? 

An apple and blueberry crumble is essentially just baked blueberries and apples with an oat topping. But this one in particular adds a little twist. Instead of the traditional streusel topping, our recipe has an oatmeal cookie topping! It’s soft and cinnamony and gives an amazing texture to the crumble. I personally love this version, I feel like you could try so many different cookie toppings for other crumbles! This recipe is super simple and extra delicious, you can’t go wrong with this apple blueberry dessert any time of the year! 


  • granny smith apples 
  • lemon juice
  • cinnamon 
  • nutmeg 
  • salt 
  • cornstarch
  • vanilla extract 
  • blueberries 
  • butter 
  • light brown sugar
  • white sugar 
  • egg 
  • maple syrup
  • all-purpose flour 
  • rolled oats 

How to make apple and blueberry crumble 

Prepare the apples

The ingredients list may be a little long but I promise this recipe is as easy as making a batch of cookies and throwing some fruit in a pan. Because that’s exactly what it is! Okay so let’s start by preparing the apples. Peel and chop your 3 apples into medium sized pieces. I tried to match mine to around the same size as the blueberries I had so that they would all be able to cook evenly. Granny smith is the best kind to use in my opinion because the tartness works so well with the sweetness of everything else. But any type of apples will work just fine! 

Add your apples to a bowl and then add your lemon juice, cinnamon, nutmeg, salt, and vanilla. Mix everything together until the apples have been evenly covered with everything. Then, in a separate bowl, mix your cornstarch with ⅓ cup of water until it has dissolved evenly. Add this to the apples and mix again. Take your 9”x13” casserole dish and lightly grease it with some butter or oil. I like to have a little something there to ensure that nothing sticks. 

Add the fruit

Next, gently add your apple mixture to the casserole dish and spread the apples out all over the bottom. Then, add your blueberries to the dish as well. You can either mix them all together here or just spread out the blueberries so they have been evenly distributed across the pan. I used fresh apples and frozen blueberries because that was the easiest for me. You can most definitely use either both fresh or both frozen. Whatever works for you and whatever you can find will work perfectly for this recipe! Next, preheat your oven to 350℉ and set your fruit aside. 

Make oatmeal cookie topping

While the oven is preheating, start making your oatmeal cookie topping. We make this just like we make any other cookies. Start by melting your butter and adding it to a large mixing bowl or the bowl of a stand mixer. You can mix these either way you’d prefer. Next, add both sugars and mix everything together until it is evenly and well combined. Then you can add the egg, vanilla, and maple syrup. Mix again until everything is combined well. If you’re using a stand mixer, make sure you also scrape down the sides of the bowl here to ensure an even mix! 

An overhead view of the final product in the pan. Apples, blueberries, forks, and plates surround.

Next, add your dry ingredients: flour, salt, cinnamon, and nutmeg. Mix gently here until everything is just combined. It’s okay to have a few pockets of flour at this step because we still have to add the oats. After that, add the rolled oats and mix one last time. You can set this mixture aside until we’re ready to put it on top of the fruit. By this time your oven will likely have reached temperature. Now you can place the casserole dish with the fruit in the oven and let it cook for 15 minutes. 

Add the topping to the fruit

After the 15 minutes is up, it’s time to add the oatmeal cookie topping! I recommend taking the dish out of the oven to do this because it might take a few minutes. Add your cookie mixture right on top of the fruit in dollops. This absolutely does not have to be perfect, we’re just looking to get the majority of the fruit covered. It’s okay if there are empty spaces. Use all of the cookie mixture and place it however it best fits on top of your fruit. Then, place your casserole dish back into the oven and bake for another 15-20 minutes. 

When the cookie topping is done, the apple and blueberry crumble is ready to come out of the oven! You’ll be able to see some browning around the edge of the pan and you’ll be able to feel if the cookie is fully baked. 15 to 20 minutes is more than enough time for that topping to get cooked through! Once it is out of the oven, let it cool down for a little bit so that it’s not piping hot. After that you can serve it pretty much immediately! 

Serve and enjoy

This crumble is best served warm so if you can have it right away that’s perfect but if not I totally recommend popping it into the microwave before diving in! And now you can add some ice cream or whipped cream or anything your heart desires while indulging in your delicious apple and blueberry crumble!  

How to store 

If you have any apple and blueberry crumble leftover you can store it in an airtight bag or container in the refrigerator for up to 5-7 days. You could also cover it tightly with some plastic wrap and just keep that in the fridge as is. It’s a little bit of a pain to transfer it from one container to another so if you have the space, that’s a great option! 

If you’d like to save this crumble any longer you can definitely freeze it! Just carefully place it into a freezer safe bag or container and you can keep it in there for up to three months. When you’re ready to have some again just take it out and let it defrost completely. I especially recommend microwaving it in this case as well to get that fresh feel. 

apple and blueberry crumble in a plate with a fork and server surrounding

Apple and Blueberry Crumble

Apple and blueberry crumble is the next dessert you never knew you needed. With apples, blueberries, and an oatmeal cookie top, you’ll want to make this one over and over again. It’s light and bursting with fruit flavour that will have you and anyone you share it with wanting seconds. 
Prep Time30 minutes
Cook Time35 minutes
Total Time1 hour 5 minutes
Course: Dessert
Cuisine: American
Keyword: apple, apple and blueberry, apple and blueberry crumble, blueberry, crumble, oatmeal cookies
Servings: 12
Author: Gianna


Fruit Bottom

  • 3 medium granny smith apples peeled and chopped
  • 1 tbsp lemon juice
  • 1 tsp cinnamon
  • ¼ tsp nutmeg
  • ¼ tsp salt
  • 2 tsp cornstarch +⅓ cup water
  • 1 ½ tsp vanilla extract
  • 4 cups frozen blueberries

Oatmeal Cookie Topping

  • ½ cup butter melted
  • ½ cup light brown sugar
  • 2 tbsp white sugar
  • 1 egg
  • 1 tsp vanilla extract
  • 2 tbsp maple syrup
  • 1 cup all-purpose flour
  • ½ tsp salt
  • ½ tsp cinnamon
  • tsp nutmeg
  • 1 ½ cups rolled oats


  • Peel and chop the apples.
  • Add apples to a bowl along with the lemon juice, cinnamon, nutmeg, salt, and vanilla. Mix until the apples are evenly covered.
  • Mix cornstarch with ⅓ cup water and add to the apple mixture. Mix again.
  • Add the apples to a greased 9”x13” casserole dish and add the blueberries on top. Spread out until evenly distributed.
  • Preheat oven to 350℉.
  • Make the oatmeal topping. Add butter and sugars to a mixing bowl or the bowl of a stand mixer. Mix until well combined.
  • Add egg, vanilla, and maple syrup and mix again, scraping down the sides of the bowl as needed.
  • Add flour, salt, cinnamon, and nutmeg. Mix until just combined.
  • Add rolled oats and mix again until evenly distributed. Set mixture aside.
  • When the oven has reached temperature, place the casserole dish in to cook only the fruit for 15 minutes.
  • Add the oatmeal cookie topping on top of the fruit and bake for another 15-20 minutes.
  • Let cool for 10-15 minutes and enjoy right away!

Try these fruity treats next:

Strawberry Lemon Blondies

Blackberry Mojito Mocktail

Berry Vanilla Ice Cream Sandwiches

Strawberry Jam Cookies

White Chocolate Raspberry Blondies

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