When fresh berries aren't available, try defrosted frozen fruit in this easy Blueberry Crisp dessert. Top with a scoop of vanilla ice cream and allow it to melt just a little to make this blueberry dessert recipe one you'll dream about.
Preheat oven to 375°F. In a large bowl, stir together the 3 tablespoons flour and the granulated sugar. Add blueberries and lemon juice; toss gently to combine. Spread berry mixture evenly in an ungreased 3-quart rectangular baking dish; set aside.
For topping, in a medium bowl, combine brown sugar, the 3/4 cup flour, the oats, and cinnamon. Using a pastry blender, cut in butter until mixture resembles coarse crumbs. Sprinkle topping evenly over berry mixture.
Bake, uncovered, about 30 minutes or until topping is golden brown and edges are bubbly. Cool on a wire rack about 45 minutes. Serve warm with vanilla ice cream, if desired.