Preheat your oven to 350 degrees Fahrenheit.

To prepare the filling, add your sliced peaches to a 9x13 baking dish. Add the arrowroot powder or cornstarch and coconut sugar or maple syrup. Stir until combined and set aside.

To prepare the crumble topping, add the almond flour, oats, maple syrup, melted coconut oil, and cinnamon. Stir until combined and a crumbly mixture forms.

Sprinkle the crumble mixture evenly over your peaches.

Bake in the preheated oven for 53-56 minutes, or until the top is slightly golden.

Allow to cool before serving.