To make the blueberry filling, mix the blueberries, lemon juice, zest, cornstarch, sugar, and vanilla together in a large bowl.
To make the crumble topping, mix the flour, sugar, and cinnamon together in another large bowl. Cut in the butter with a fork until it’s the size of peas. Stir in the oats and walnuts.
Pour the blueberry filling into the prepared baking dish and sprinkle the crumble mixture on top, spreading it out evenly. Bake in the oven until blueberries are cooked and bubbling, about 45 minutes. Let cool 15 minutes before serving. Serve alone or with a dollop of ice cream or whipped cream.
Makes 8-10 servings
Blueberry Walnut Crumble
Amount Per Serving
Calories 236Calories from Fat 81
% Daily Value*
Total Fat 9g14%
Saturated Fat 4g20%
Total Carbohydrates 38g13%
Dietary Fiber 3g12%
* Percent Daily Values are based on a 2000 calorie diet.