Preheat oven to 350°F.
Prepare filling: Mix peaches, cinnamon, sugar, and maple syrup until coated..
Transfer to dish: Spread peach mixture into greased baking dish.
Make topping: Combine flour, sugar, cinnamon, and softened butter until crumbly.
Assemble: Sprinkle topping evenly over peaches.
Bake 20–25 minutes, until topping is golden and peaches bubble.
Cool slightly and serve warm
