Peaches hit their peak for like three weeks a year and I lose my mind every single time. Buying way too many at the market, eating them over the sink, and then inevitably?? Crisp. Because you can only eat so many fresh before you need to bake them into something.
The fruit gets jammy and bubbling underneath, the oat crumble goes golden and crisp on top with brown sugar buttery pockets throughout, and your kitchen smells absolutely UNREAL the entire time it’s in the oven. Scoop of vanilla ice cream (because warm crisp without ice cream is just wrong, we don’t do that here).
One bowl. Ten minutes of actual work. Peak summer dessert achieved.
Fresh vs. Frozen Peaches: Does It Matter?
- FROZEN peaches mean zero prep. No peeling, no slicing. Toss them in still frozen.
- Expect extra liquid from frozen fruit. Bump cornstarch to 1.5 tbsp so the filling thickens properly.
- If you’re going fresh, choose peaches that yield slightly to pressure but aren’t mushy. They’ll hold shape while baking.
- Skip the peeler. Score an X, blanch 30 seconds, ice bath, and the skin slides right off (way easier than wrestling with a vegetable peeler).
Frozen is faster, fresh is peak summer. Either way, you’re winning.
How to Get a Perfect Crispy Topping
Keep that topping CRUMBLY, not paste. Mix with your hands just until clumpy, then STOP…. overworking it makes the crumble dense and cakey instead of crisp.
Use OLD-FASHIONED OATS (never quick oats… they turn to mush). Spread the topping loosely all the way to the edges, then bake until you see real GOLDEN BROWN color. Pale topping = sad, soggy topping!
How to Peel Peaches Quickly
Peaches for a crisp do NOT need to be a wrestling match with their skins. Here’s the fastest method for the eight cups this recipe demands.
- Score the bottom of each peach with a small “X” using a sharp paring knife. Just deep enough to break the skin.
- Bring a large pot of water to a full rolling boil. Drop peaches in for 30 to 45 seconds MAX. (Longer and they turn to mush.)
- Pull them out with a slotted spoon and plunge straight into an ice bath. The shock is what makes the skins slide right off.
- Pinch the scored end and watch the peel slip away in your hands. No peeler needed!
- Slice them thin and toss with the sugar mixture from the recipe. Done in under five minutes flat.
Storage & Reheating Tips
- REFRIGERATE within 2 hours of baking. Cover tightly with foil or transfer to an airtight container. Stays good for 3-4 days.
- FREEZE for longer storage. Wrap the whole pan in plastic wrap then foil, or portion into single servings. Keeps up to 3 months.
- REHEAT in a 350°F oven for 10-15 minutes until warmed through (this keeps the topping crisp!). Microwave works in a pinch but expect a softer crunch.
- TOP with vanilla ice cream when serving leftovers… it’s non-negotiable.
Similar Recipes
- Sweet Raspberry Crumble
- Peach Cobbler with Cake Mix
- Strawberry Rhubarb Galette with Puff Pastry
- Strawberry Dump Cake
- Rhubarb Galette with Peaches
- Rich Pumpkin Pie Crumble Bars
Estimated Nutrition
Estimated nutrition for the whole recipe (without optional ingredients):
- Calories: 3000-3200
- Protein: 30-40 g
- Fat: 120-130 g
- Carbohydrates: 480-500 g
Ingredients
For the fruit filling:
- 8 cups peeled, thinly sliced fresh peaches
- 1/2 cup white sugar
- 2 tbsp all-purpose flour
- 1 tbsp cornstarch
- 1 tsp ground cinnamon
- 1/4 tsp salt
For the crumb topping:
- 3/4 cup light brown sugar, packed
- 1/2 cup salted butter, at room temperature (1 stick)
- 1/2 cup all-purpose flour
- 1 tsp ground cinnamon
- 1 3/4 cup old-fashioned oats
Step 1: Ready the Oven and Pan
Preheat your oven to 400°F.
Butter a 9×9 baking pan to prevent sticking, then set it aside for later.
Step 2: Coat the Fruit Filling
- 8 cups peeled, thinly sliced fresh peaches
- 1/2 cup white sugar
- 2 tbsp all-purpose flour
- 1 tbsp cornstarch
- 1 tsp ground cinnamon
- 1/4 tsp salt
In a large bowl, combine the peeled, thinly sliced peaches, white sugar, 2 tablespoons of all-purpose flour, cornstarch, 1 teaspoon of ground cinnamon, and salt.
Mix thoroughly until the peaches are evenly coated and the mixture is well combined.
Pour the prepared peach mixture into the buttered pan and spread evenly.
Step 3: Mix the Oat Crumble
- 3/4 cup light brown sugar, packed
- 1/2 cup all-purpose flour
- 1/2 cup salted butter, at room temperature (1 stick)
- 1 tsp ground cinnamon
- 1 3/4 cup old-fashioned oats
In the same large bowl, combine the packed light brown sugar, remaining 1/2 cup all-purpose flour, room-temperature salted butter, and the remaining 1 teaspoon ground cinnamon.
Cream these together with a spoon or your hands until a wet, clumpy mixture forms.
Add the old-fashioned oats to the bowl and mix until a coarse, crumbly texture develops.
I find it easiest to mix this with my hands for even blending.
Step 4: Layer and Bake
- peach mixture from Step 2
- oat crumble topping from Step 3
Evenly sprinkle the oat crumble topping from Step 3 over the peach filling in the baking pan.
Make sure to distribute the topping all the way to the edges for a uniform, golden crust.
Bake in the preheated 400°F oven for 20 to 25 minutes, until the oats start to turn a light golden color around the edges.
Step 5: Rest, Slice, and Enjoy
Remove the baked peach crisp from the oven and allow it to rest for 10 minutes so the filling can set.
Serve warm—if you want to make it even more delicious, I like to top mine with a scoop of vanilla ice cream.