This blueberry crumble, easy to make with blueberries and a buttery oat brittle cookie topping, is simple, easy, and the best blueberry dessert we can imagine. Simple and spectacular. Better make a double batch.
This blueberry crumble recipe with its oatmeal cookie topping and simple burbling blueberry filling that’s not too sweet and not too tart is exactly what you bring to a backyard bash when all you want is mad crazy gratitude and an empty dish to take home.
It’s simple. It’s easy. And it’s the most crowd-pleasing summer dessert we’ve got in our repertoire. One taste and we think you’ll understand. Kindly note, it also functions admirably as breakfast when topped with blueberry ice cream, which is essentially oatmeal with fruit and milk, yes?!
Why Our Testers Loved This
It was no surprise that the testers adored this classic blueberry crumble recipe. They loved the juxtaposition of “warm fruit with the crisp, crunchy texture of the topping” and were delighted that it was such a quick and easy recipe. Lori W. has declared it “a new family favorite.”
Natalie Reebel calls this “one of the best fruit desserts–and not just blueberry–I’ve ever made.” High praise, indeed.
Notes on Ingredients
- Fresh blueberries–If blueberries aren’t in season and you have a stash of frozen ones in your freezer, you can substitute those.
- Lemon juice–The amount of juice you use will depend on how tart your blueberries are. I recommend using freshly squeezed lemon juice.
- Unsalted butter–If you use salted butter, reduce the amount of salt in the crumble to 1/4 teaspoon.
How to Make This Recipe
- Heat the oven to 375°F. Butter a pie plate. Mix the blueberry filling ingredients in a large bowl.
- Dump the filling ingredients into the prepared pie plate. Arrange in an even layer in the pie plate.
- Combine the flour, oats, sugar, vanilla, and salt in a separate large bowl. Add the butter, and use your fingers or a pastry cutter to mix until well combined.
- Sprinkle the crumble topping evenly over the filling. Bake until the filling is bubbling and the topping is golden brown. Cool slightly before serving.
Just in case our mums are listening, the fruit is the most important part of a crumble so the crispness of the topping shouldn’t even matter. Just kidding—our mums know what’s up. And crumble topping has to be crunchy, crisp, and crumbly.
If the topping isn’t a rich all-over golden brown, it’s possible that you didn’t cook your crumble enough. Reducing the amount of butter in the topping will also result in a dry, crumbly topping. Butter, which encourages both browning and crispness, is the magic ingredient in getting your topping just right, so follow the recipe instructions.
Sure thing. We’ve made this recipe with only blueberries, with blueberries and raspberries, and with blueberries, raspberries, and blackberries. They’re all amazing.
You could absolutely substitute other berries or add pitted, sliced cherries. Just be sure to weigh your berries so that your crumble-to-fruit ratio isn’t affected – because you’re gonna want all of that buttery, crispy crumble.
As with most recipes, we recommend you make it the first time exactly as it’s written, then feel free to get creative on your second, third… hundredth times. But, if and when you come up with a tasty new fruit combo, do let us know.
In our experience, fingers work way better than a pastry cutter. It’s faster and easier to get the right crumble texture with your hands. If butter under your fingernails grosses you out, use a food-safe glove.
- To make individual servings, divvy the filling and crumble between ramekins and bake until bubbling and golden.
- If making this with frozen blueberries, thaw and drain the blueberries before baking.
- Leftover blueberry crumble can be stored at room temperature, loosely covered, for up to 3 days.
More Great Crumble Recipes
Write a Review
If you make this recipe, or any dish on LC, consider leaving a review, a star rating, and your best photo in the comments below. I love hearing from you.–David
Loved it!!! Followed the recipe exactly and had to make it again the next day as there weren’t any leftovers!Nancy w.
For the blueberry filling
- 12 ounces (about 1 pint) fresh blueberries
- 1/2 cup granulated sugar
- 2 tablespoons all-purpose flour
- 1 to 2 tablespoons lemon juice depending on how tart the blueberries
- 1/4 teaspoon kosher salt
For the crumble
- 3/4 cup all-purpose flour
- 1/2 cup quick-cooking oats
- 1/2 cup light or dark brown sugar
- 1/2 teaspoon vanilla extract
- 1/2 teaspoon kosher salt
- 1 stick (4 oz) unsalted butter cut into cubes and softened just a little, plus more for the pie plate
- Vanilla ice cream preferably homemade
Prepare the oven and pan
- Preheat the oven to 375°F (190°C). Adjust the oven rack to the center position. Generously butter a 9-inch pie plate.
Make the blueberry filling
- Nibble a blueberry or three to determine how sweet or tart it is. Toss the blueberries with the sugar, flour, lemon juice, and salt, adjusting the amount of lemon juice according to the relative sweetness or tartness of the berries. Dump the berries into the pie plate.
Make the crumble topping
- In a large bowl, stir together the flour, oats, brown sugar, vanilla, and salt. Blend in the butter, using your fingertips or a pastry cutter, and mix until well combined. Crumble the topping over the berries in clumps of varying sizes.
- Bake the blueberry crumble until the berry filling is bubbling and the crisp oat topping is set and browned in places, 25 to 35 minutes. Let the crumble cool a little (but not a lot) before spooning it onto plates or into dishes and serving it warm with a scoop of ice cream plopped on top or on the side or wherever you choose.
- Individual servings–To make individual servings, divvy the filling and crumble between ramekins and bake until bubbling and golden.
- Use frozen berries–If making this with frozen blueberries, thaw and drain the blueberries before baking.
- Storage–Leftover blueberry crumble can be stored at room temperature, loosely covered, for up to 3 days.
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Nutrition information is automatically calculated, so should only be used as an approximation.
Recipe Testers’ Reviews
I have always shied away from blueberry crumbles and cobblers and crunches because they can be so sugary sweet. This one, however, is one of the best fruit desserts–and not just blueberry–I’ve ever made.
The easy-to-prepare crumble topping is absolutely wonderful. It bakes up golden brown and slightly crisp and adds just the right texture to the dish. The fruit portion of the crumble is perfectly balanced–not too sweet and not too tart.
Add a scoop of creamy vanilla ice cream and you have a dessert that looks humble but is so luxurious and satisfying. This recipe is well worth getting butter on your hands for.
Yum! Simple and sooo good. This blueberry crumble is much easier than a pie. The recipe makes a nice-sized dessert that’s great for a weekday meal. Next time I might put a little less flour in the filling, but otherwise I wouldn’t change a thing.
This was one of those perfect-storm recipes with all the right elements coming together to make something amazing. The warm fruit with the crisp, crunchy texture of the topping paired with the creamy cold ice cream was perfect.
The only debate in the family was if the blueberry crumble should be on the side of the ice cream, underneath it, or on top, although maybe this was just an excuse for each of us to have three helpings. The majority felt side-by-side was best to allow you to have total control of the ratio of cold to warm in each bite. The recipe came together very quickly and was so easy. This is a new family favorite!
A 10 in my book. Excellent and loved by my hubby and our houseguest. We all ate the blueberry crumble as quickly as we could. Quick and easy and sure to be a stand-by during blueberry season.
If you want a dessert that’s quick and easy to put together and will delight your guests, make this blueberry crumble and serve it with vanilla ice cream or homemade cinnamon gelato.
The recipe works as-is, no need for any changes. The lemon juice brings a nice brightness to the richness of the dessert. The only trouble is that the recipe says it serves 6 to 8 but it’s more like 4 to 5 as everyone will go back for seconds!
This blueberry crumble takes no time to put together and can be divided, like I did, to make individual tarts. The topping was nice and crunchy.
I didn’t do the ice cream–we just ate it warm from the oven–although I’m going to fold the leftovers into some ice cream, just like the ice cream companies do! Enjoy this little recipe.
This blueberry crumble is a breeze to make and looks wonderful.
If you have sweet-toothed friends and family, then this would be great for them. Although my niece and others loved it, this was too sweet for my tastes. If I made it again for myself, I’d leave out some of the sugar.
This blueberry crumble is a delicious dish. I was going to call it a delicious dessert, but it proved to be a delicious breakfast, too. (Lunch, anyone?) It’s very quick and easy to throw together.
Although I sprinkled the crunchy topping on evenly, I found that it seemed to morph and clump up in spots. The very center of the crumble was still a bit wet, even after the berries were bubbling away and the outside of the crumble was browned. I removed it from the oven anyway. And it in no way stopped this from being a winner.
The finished product is excellent even without ice cream.
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We were moving out of our apartment last weekend and I wanted to do something sweet—literally—for the super and the doormen who work at the apartment building, but I didn’t have a heck of a lot of time. So I threw together this crumble topping and heaped it on top of my usual classic apple pie filling and baked it.
But it never made it to its intended recipients. My 12-year-old nephew and my husband caught one whiff of the dessert cooling on the stovetop and the rest was history.
My guys loved the crumble topping for its own merits as well as the fact that it doesn’t try to compete with the fruit beneath. And I loved the fact that I could toss it together in less than 10 minutes.
It’s now our go-to topping for any sorta fruit that’s in season. Blueberries. Peaches. Pears. Rhubarb. One of these times maybe I’ll be able to sneak a crumble out of the kitchen to the guys at the old building.
P.S. It’s months later, and at least once a week my nephew wakes up begging for this crumble for breakfast. And his grandma (my mother-in-law) just devoured the entire crumble I made for my nephew’s birthday so I had to make another one. And my family, whom I baked the blueberry version for when I was visiting, have been asking for the recipe and already told me I’m not welcome in their homes unless I bring it again. And the neighbors who tried it for the first time last weekend? They just demanded that we bring another one to their backyard barbecue this afternoon—actually, they asked that we bring two. It’s that good.
The blueberry crumble recipe worked very well. I’d like to substitute crushed pretzels for the oats and take out the salt.
Delicious and simple! Perfect for a busy housewife 🙂
Love your comment as much as I love this blueberry crumble, Karen J!
This recipe was super easy to make and I followed the ingredients to a tee except I didn’t use as much sugar with the blueberries as they were already very sweet and I also added a little cinnamon to the crumble dough. I doubled the crumble recipe and generously topped the dish. I probably have less than half the crumble left for another crisp or recipe. I did add some grated lemon zest (probably 4 swipes of the microplane’s worth as well in addition to a generous squeeze from an end cut of lemon) to the blueberries. The salt in the crumble topping was predominant as I used sea salt and it was delicious. We served it out of deep bowls with generous scoops of vanilla ice cream. I want to make this again and incorporate sliced almonds. I’m going to Maine at the end of the week and could make this crumble topping and have it baked off with fresh blueberries on top of ice cream, Greek yogurt parfaits, and of course warm and bubbly per the recipe. Perfect recipe to honor blueberry season!
Carlin, thank you so much for taking the time to let us know your tricks! We love it when readers make a recipe their own. Absolutely love it. Especially when they share what they do! Looking forward to hearing which recipe on the site you try next.
I made this !! It was just wonderful !! It was easy to put together and so good ! Thank you so much for the recipe!!
A taste of summer in the winter utilizing frozen berries. I adjusted the crumble to 1/2 cup flour, a little over a half cup oats, and 1/3 cup butter. Simply delicious!!!!!!
LOVE your tweaks, Ophelia! Love them. Necessity truly does give birth to creative genius. Thank you SO much for taking the time to share the frozen berry variation with us!
Thank you so much for sharing this recipe. I’ve made it countless times for family and friends and everyone loves it. It’s wonderful warm, but it’s also delicious straight from the refrigerator the next day–not that there’s usually any left the next day! I was surprised to see vanilla extract as a topping ingredient, but it’s perfect, and helps to make this blueberry crumble outstanding.
Janice, I feel exactly the same as you about this recipe. Everyone raves! So glad you’ve found it. Personally, I love the topping so much I double the amount I use for the amount of blueberry filling.
Can this be prepared a day ahead?
Cory, the short answer is no. I’ve tried it. The crumble topping—which is spectacularly delicious in an oatmeal cookie sorta way—turns soggy and is a sad and pale comparison to what it is when the crumble is just out of the oven. What I do to save time when I’m serving this to a crowd is I make the crumb topping ahead of time and crumble it and freeze it in resealable plastic bags. Then just crumble it on the blueberry filling at the last minute and slide it straight in the oven. Also, we’re big fans of that crumble topping, so I usually double and, I confess, sometimes triple the amount in this recipe. Just because.
Oh my! Hubby would love this! Pinning now! Thanks for sharing!!
You’re so very welcome, Shilpa!
The best recipe for a crisp or crumble. Delete all others. Serves 6 to 8? Must certainly be a typo.
Hah! Penny, so funny you typed that, I always at least double the recipe (and, to be truthful, I usually triple or quadruple it).
Amazing recipe. Super easy. Everyone loved it. My mom even said it was one of the best things she has tasted in a while.
Wonderful to hear, Robyn! We hear this from just about everyone who makes it, and we feel the same. In fact, my mother-in-law loves this so that when I visit her, I assemble small individual portions and then freeze them so whenever she craves dessert she can simply bake one. She’s always forlorn after she bakes the last one.
Renee, when taking the crumble out of the freezer, do you need to thaw before baking or can you just pop it in the oven? If “popping,” what would the adjustments be?
Jan, I go straight from freezer to preheated oven. I let it go until the crumble topping is golden brown and the filling is bubbling, and I confess that I’ve never paid exact attention to how much longer I let them in the oven. At least 10 minutes more. I’ve made her the blueberry crumble and also peach crumble and apple crumble and plum crumble, always using this crumble topping and either swapping in the fruit for the blueberries and easing up on the sugar a touch or simply using my favorite pie filling recipe for that particular fruit. Always turns out lovely even when first frozen.
I love this recipe. It was so simple and turned out delicious. I’ve been meaning to write a review as I made this on July 4th last summer. Because of the occasion, I added strawberries too for red white and blue! The ratio was 2 parts blueberries to 1 part strawberries. Everyone loved it. I will never look for another crumble recipe.
Alicia, thanks so much for taking the time to let us know you love this crumble as much as we do! I am so with you on never needing to look for another crumble. And that topping is so incredibly versatile. My 13-year-old nephew inhales this when I make it with apple pie fixings instead of blueberry. (He calls it “apple stuff” and has been known to murmur this in his sleep.) I’ve also tried the crumble with a peach filling beneath the topping and had my mother-in-law begging me to make it again. Don’t think you can go wrong!