Blueberry Crumble – Sweet, juicy blueberries baked beneath a golden, buttery oat crumble topping. An easy, comforting dessert that’s perfect served warm with vanilla ice cream!

There’s nothing quite like a warm, homemade fruit crumble! This Blueberry Crumble is bursting with sweet, juicy blueberries, lightly flavoured with cinnamon and lemon, and topped with a golden, buttery crumble that’s deliciously crisp on top and soft underneath.
It’s wonderfully easy to make with just a handful of simple ingredients, and you can use either fresh or frozen blueberries. The filling becomes beautifully thick and jammy as it bakes, while the oat crumble adds the perfect buttery crunch. Serve it warm with a generous scoop of vanilla ice cream, a drizzle of cream, or some homemade custard for the ultimate comforting dessert!
Looking for more delicious blueberry recipes? Try my Blueberry Crumble Bars, Homemade Blueberry Pie, or Blueberry Chocolate Chip Muffins.
Happy baking,
Marsha x

Blueberry Crumble
Ingredients
For the Blueberry Filling
- 4 ½ cups (675g) fresh blueberries
- ½ cup (100g) granulated sugar
- 2 tablespoons (20g) cornflour/cornstarch
- 1 tablespoon lemon juice
- ½ teaspoon ground cinnamon
For the Crumble Topping
- 1 ¼ cups (156g) plain/all-purpose flour
- ½ cup (115g) unsalted butter, cold and cubed
- 1 cup (90g) rolled oats
- ¾ cup (150g) light brown sugar
- ½ teaspoon ground cinnamon
Instructions
For the Blueberry Filling
- Preheat the oven to 180C/160C Fan/350F/Gas 4.
- Place the blueberries, sugar, cornflour, lemon juice, and cinnamon into a large saucepan over medium heat.
- Stirring occasionally, cook for about 10 – 15 minutes until the blueberries start to break down, and the mixture has thickened.
- Remove from the heat and pour into an 8×8-inch square baking pan. Leave to cool whilst making the topping.
For the Crumble Topping
- In a large mixing bowl, rub the butter into the flour until the mixture resembles breadcrumbs.
- Stir in the oats, sugar, and cinnamon. Use your hands to really mix together.
- Sprinkle evenly over the blueberry filling (use as much or as little as you want) and bake for 35 – 40 minutes, or until the filling is bubbling at the edges and the topping is golden brown.
- Allow to cool for 15 minutes before serving. Enjoy!