01 -
Preheat oven to 375°F. Grease an 8x8 inch pan or double the recipe for a 9x13 inch pan.
02 -
If using frozen berries, thaw them first. Combine the berries, sweetener of choice, and optional cornstarch, then spread into the prepared pan.
03 -
In a mixing bowl, combine flour, oats, sugar, and cinnamon. Cut the butter into the dry ingredients using a fork or pastry cutter until small crumbles form. If using oil, simply stir it into the mixture.
04 -
Sprinkle the crumble topping evenly over the berries. Bake on the center rack for 25-30 minutes, or until bubbly and lightly browned.
05 -
Let the crisp cool before serving, as it thickens while it cools. It will also thicken overnight. Serve hot or cold as desired.
06 -
Store leftovers covered in the refrigerator, or freeze for later use.