Made with wholesome gluten-free ingredients, this gluten free apple crisp is gooey in the center and perfectly crisp on the outside. Easier than baking a whole apple pie, it's a simple dessert that's always a hit.
Butter an 8x8 baking dish, and preheat oven to 350F with rack on middle position.
In a bowl, combine all topping ingredients except butter. Stir to combine well. Using a pastry cutter, cut cold butter into the ingredients until mixture is crumbly, resembling wet sand with little clumps of butter still intact. (If your fingers are cool, it's easier to mix with clean hands.) Cover and chill while you prepare the filling.
In a large bowl, combine all filling ingredients and toss to incorporate. Pour into buttered baking dish. Scatter cold topping evenly over the apples.
Place baking dish on a large baking sheet. Bake uncovered for 45 minutes, check the topping, and cover loosely with foil if it's already browning. Continue baking another 15 minutes, or just until topping is nicely browned and edges are bubbling.
Let cool at least 1-2 hours or until lukewarm to allow filling to thicken.