Blueberry crisp is a quick and easy go-to summer dessert! Sweet blueberry filling is topped with a crunchy oat crust and baked to perfection in the oven.
Preheat oven to 375 degrees Fahrenheit. Grease a 2-quart baking dish (or 8 inch square baking pan) and set aside.
In a large bowl, add blueberries, cornstarch, granulated sugar, lemon juice, lemon zest, and vanilla extract. Toss to combine. Pour filling into prepared dish and set aside.
In a separate bowl, add dry topping ingredients: flour, oats, cinnamon, brown sugar, and salt. Add melted butter and stir until combined. Mixture will be thick and crumbly.
Crumble topping evenly over blueberry filling. Bake for about 55-60 minutes, or until blueberry filling bubbles in the center of the dish and crust is browned across the top.
Allow to cool slightly before serving. Serve warm or room temperature with a scoop of vanilla ice cream.
Notes
Use a 2 quart baking dish or 8x8 square baking pan for best results.
To use frozen blueberries - Thaw and drain excess liquid before preparing filling.
Blueberry crisp will keep for 3 days, covered, at room temperature, or up to a week in the refrigerator.