Published: Dec 21, 2017 · Last Updated: Dec 21, 2023 by Dr. Sonali Ruder · This post may contain affiliate links · As an Amazon Influencer, I earn from qualifying purchases · 2 Comments

Blueberry Walnut Crumble

Name: Blueberry Walnut Crumble
Prep time: 15 min
Cook time: 45 min
Total time: 60 min
Ingredients: 6 cups (36 oz) fresh or frozen blueberries; 2 tablespoons lemon juice; 2 teaspoons lemon zest; 2 tablespoons cornstarch; 1/3 cup coconut sugar or light brown sugar; 1 teaspoon vanilla extract; ¾ cup flour ((I used white whole wheat)); ⅓ cup coconut sugar or light brown sugar; ½ teaspoon cinnamon; 5 tablespoons cold unsalted butter or coconut oil, cut into small pieces; ½ cup rolled oats; ¼ cup chopped walnuts

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My easy Blueberry Walnut Crumble is made with sweet blueberries and topped with a crumbly, walnut streusel topping. It’s a delicious and healthy dessert- perfect for the holidays!

Angled photo of blueberry crisp in a square baking dish with holiday decorations.

Holiday season is in full swing and I’m loving it! Amidst all of the hustle bustle, I always love to squeeze in some holiday baking- peanut butter cookies, chocolate almond clusters, cake, pies, you name it!

My daughter Sienna loves to get in the kitchen with me when I’m making holiday desserts. We especially love to make fruit crisps and crumbles. A delicious baked dessert made with a fruit filling that’s topped with a crumbly, streusel topping and baked in the oven until bubbly. What’s not to love about that?

I make a delicious healthy apple cranberry crisp as well as slow cooker apple crisp that practically makes itself!

Fruit crumbles are the perfect dessert for the holiday season. Not only are they really easy to make, they can also feed a crowd. And you can prepare the whole thing the night before!

I’m so excited to share the recipe for my Blueberry Walnut Crumble with you. It’s the perfect dessert to serve at your holiday party or to take to a potluck. I promise you- it’s always a crowd-pleaser!

Why You'll Love This Dish

Wholesome Ingredients: Made with nutrient-dense blueberries and walnuts, which are packed with antioxidants and heart-healthy fats. It's a healthier alternative to traditional desserts.
Easy: Simple and straightforward recipe that even beginners can master.
Versatile Ideal for both special occasions and everyday cravings.
Family-Friendly: A crowd-pleaser that the whole family will love.
Make-Ahead: Prepare this blueberry crumble in advance and bake it when ready to eat.

Fresh vs Frozen Blueberries

The filling for this blueberry walnut crumble features delicious, nutrient-packed blueberries. Worried that blueberries are out of season this time of year? No worries, I actually use frozen blueberries in this dish!

Frozen blueberries are a staple that everyone should have in their freezer. They’re available all year round at the grocery store in the freezer section. They're perfect for stirring into overnight oats, yogurt, smoothies, popsicles, and desserts like this. I also make an easy triple berry crisp from frozen berries.

Blueberries are picked and quick-frozen at the peak of ripeness so that their taste and nutrients are preserved. Frozen blueberries can be stored up to 10 months in the freezer.

Doctor's Tips

Blueberries are a superfood and are packed with nutrients!
They are an excellent source of vitamin C with one serving providing almost 25 percent of the daily recommended amount. They also are a good source of fiber.
And at only 80 calories per cup, blueberries are an excellent way to add natural sweetness to your dishes so that you can cut back on added sugars.

How To Make Healthy Blueberry Crumble Step-By-Step

See recipe card at the end of the post for full recipe details.

Step 1- To make the blueberry crumble filling, mix the blueberries, lemon juice, zest, cornstarch, sugar, and vanilla together in a large bowl.
Step 2- To make the crumble topping, mix the flour, sugar, and cinnamon together in another bowl. Cut in the butter with a fork until it’s the size of peas.
Step 3- Stir in the oats and walnuts.
Step 4- Pour the blueberry filling into a greased baking dish and sprinkle the crumble mixture on top, spreading it out evenly. Bake at 350°F until topping is golden brown and blueberries are bubbling, about 45 minutes.

Let the blueberry crumble cool 15 minutes before serving. Serve alone or with a dollop of ice cream, whipped cream or Greek yogurt.

Chef's Tips

You can assemble this blueberry walnut crumble in advance, cover it, and refrigerate. Then, when you're ready to enjoy it, pop it into the oven.
Try to resist diving into it as soon as it gets out of the oven. It's best to let the crumble cool a little before serving so that the filling thickens slightly.
I love to serve this dish warm with a scoop of ice cream on top (although I do admit to eating it cold, straight from the fridge)! Leftovers are also terrific the next morning for breakfast with a dollop of Greek yogurt on top.