Step 1

Preheat the oven to 350°F.

Step 2

To make the crisp topping, mix together the oats, flour, sugar, brown sugar, salt, and cinnamon in a medium bowl. Pour the melted butter over the mixture. Stir to combine until crumbly. Set aside.

Step 3

Place the sliced peaches into a 2-quart baking dish. Sprinkle the orange zest, cornstarch, and brown sugar over the peaches and gently toss to combine.

Step 4

Sprinkle the crumble topping evenly over the peach filling.

Step 5

Bake the peach crumble until bubbly around the edges, and the topping golden brown, about 55 minutes. Check after 30 minutes and cover with foil if the topping is getting too brown.

Step 6

Let cool for 10 minutes then serve warm or room temperature with a scoop of ice cream.