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Preheat your oven to 375°F. Lightly grease an 8x8 inch baking dish or similar-sized oven-safe dish.

In a medium mixing bowl, combine the rolled oats, all-purpose flour, light brown sugar, and ground cinnamon for the crumble topping. Stir well to ensure all dry ingredients are evenly distributed.

Pour the melted unsalted butter over the dry crumble ingredients. Use a fork or your fingertips to mix until the mixture is well incorporated and forms a crumbly texture. Set aside.

In a separate large mixing bowl, whisk the 1 tablespoon of all-purpose flour for the filling. Add the fresh blueberries, fresh lemon juice, and vanilla extract. Gently toss until the blueberries are evenly coated.

Pour the prepared blueberry filling into the greased baking dish, spreading it evenly across the bottom.

Evenly distribute the crumble topping over the blueberry filling in the baking dish, ensuring the blueberries are mostly covered.

Bake in the preheated oven for 30-35 minutes, or until the blueberry filling is bubbly and the crumble topping is golden brown and crisp.

Remove the crumble from the oven and let it cool for a few minutes before serving. Serve warm with a generous scoop of vanilla ice cream.


Preheat your oven to 375°F. Lightly grease an 8x8 inch baking dish or similar-sized oven-safe dish.

In a medium mixing bowl, combine the rolled oats, all-purpose flour, light brown sugar, and ground cinnamon for the crumble topping. Stir well to ensure all dry ingredients are evenly distributed.

Pour the melted unsalted butter over the dry crumble ingredients. Use a fork or your fingertips to mix until the mixture is well incorporated and forms a crumbly texture. Set aside.

In a separate large mixing bowl, whisk the 1 tablespoon of all-purpose flour for the filling. Add the fresh blueberries, fresh lemon juice, and vanilla extract. Gently toss until the blueberries are evenly coated.

Pour the prepared blueberry filling into the greased baking dish, spreading it evenly across the bottom.

Evenly distribute the crumble topping over the blueberry filling in the baking dish, ensuring the blueberries are mostly covered.

Bake in the preheated oven for 30-35 minutes, or until the blueberry filling is bubbly and the crumble topping is golden brown and crisp.

Remove the crumble from the oven and let it cool for a few minutes before serving. Serve warm with a generous scoop of vanilla ice cream.
