Add the blackberries, sugar, brown sugar, cornstarch, lemon juice, and cinnamon to a medium saucepan. Mix well and place over medium heat.
1 pound fresh blackberries, ¼ cup granulated sugar, ¼ cup light brown sugar, 3 tablespoons cornstarch, 3 tablespoons lemon juice, 1/2 teaspoon ground cinnamon
Stir occasionally until the blackberries break down and everything becomes a thick sauce. (About 8 minutes) Be sure to watch over the mixture so the berries don’t start burning and stick to the bottom of the pan.
Preheat the oven to 350°F. Spray an 8-inch baking dish with cooking spray.
Pour the blackberry filling into a baking dish.
Add the flour, cinnamon, baking powder, and salt to a large mixing bowl and mix together with a fork.
½ cup all-purpose flour, 1 teaspoon ground cinnamon, ¼ teaspoon baking powder, ¼ teaspoon salt
Add the softened butter and mix with the dry ingredients.
3 tablespoons unsalted butter
Then add the brown sugar and granola, mixing once again until combined and crumbly.
¼ cup light brown sugar, ¼ cup granola
Sprinkle the crumble topping all over the top of the blackberry filling.
Bake for 25-30 minutes until the filling is bubbling through the crust and along the edges, and the top will be golden brown.
Let cool for a couple of minutes before serving.
Notes
Use ripe, fresh blackberries for the best flavor.
Soften the butter to ensure a perfectly crumbly topping.
Add vanilla extract to the blackberry filling for added richness.
Don’t overbake the crisp; bake until golden brown and the filling is bubbly.
Allow the crisp to cool slightly before serving for the best texture.
Top with a scoop of vanilla ice cream for a perfect pairing.