Blueberry Peach Crumble is the kind of dessert I make when I want something cozy but I do not want a whole baking project. You know those nights when dinner is done, the kitchen is still warm, and you just want a sweet smell coming out of the oven? This is that recipe. It is simple, forgiving, and it tastes like you tried way harder than you did. The peaches get juicy, the blueberries turn jammy, and the topping gets buttery and crisp. 
How to Make Blueberry Peach Crumble
What you will need
I keep this pretty classic, and you probably have most of it already. The best part is you can adjust the sweetness depending on how ripe your fruit is.
- Peaches (fresh or thawed frozen), sliced
- Blueberries (fresh or frozen)
- Sugar (white or brown)
- Lemon juice
- Cornstarch (to thicken the juices)
- Old fashioned oats
- All purpose flour
- Salt
- Cinnamon (optional, but I like it)
- Butter (cold, cut into small pieces)
I usually bake it in an 8×8 dish, but a similar size works fine. If you double it for a crowd, use a 9×13 and add a few extra minutes in the oven.
Step by step directions (no stress)
1) Heat your oven to 350 F. Lightly butter your baking dish.
2) In a big bowl, toss the peaches and blueberries with sugar, lemon juice, cornstarch, and a pinch of salt. If your peaches are super sweet, you can go lighter on sugar. If they are a little bland, add a bit more. Pour the fruit into the dish and spread it out.
3) In another bowl, mix oats, flour, brown sugar, salt, and cinnamon. Add the cold butter pieces and use your fingers to pinch and rub until it looks like chunky crumbs. You want some sandy bits and some bigger clumps. Those clumps are gold.
4) Sprinkle the crumble topping evenly over the fruit. Do not pack it down.
5) Bake for about 40 to 50 minutes, until the top is deep golden and the fruit is bubbling around the edges. If it browns too fast, loosely cover with foil for the last 10 minutes.
Little personal note: the hardest part is waiting. I always want to scoop it immediately, but it sets up better after 15 to 20 minutes. Also, if you are in a blueberry mood, you might also love this deliciously moist blueberry cream cheese bread for a breakfast style treat.
How to Serve and Store
This is one of those desserts that feels fancy with almost no effort. And it works warm, room temp, and even cold from the fridge, which is honestly dangerous.
- Serve warm with vanilla ice cream and let it melt into the topping
- Try a spoonful of Greek yogurt on top for a breakfast situation
- Add a drizzle of caramel if you are feeling extra
- For crunch lovers, sprinkle chopped pecans on the topping before baking
Storing: Cover the dish and keep it in the fridge for up to 4 days. To reheat, scoop a portion into a bowl and warm it in the microwave, or reheat the whole dish in the oven at 325 F until warm.
Freezing: You can freeze it baked. Cool completely, wrap well, and freeze for up to 2 months. Thaw overnight in the fridge, then warm in the oven. The topping will soften a bit, but it is still really good.
“I made this for a family dinner and everyone went back for seconds. The peach and blueberry combo tasted like summer, and the topping stayed crisp even the next day.”
If you love creamy, tangy blueberry desserts too, this deliciously creamy blueberry crumble cheesecake is another one that disappears fast.
Best Fruits for Crumble Recipes
I am obviously biased toward Blueberry Peach Crumble, but the real secret is that crumbles are super flexible. If you can make a juicy fruit filling and top it with buttery crumbs, you are basically set.
Here are fruits that work really well:
Peaches: soft, sweet, and they get extra jammy when baked.
Blueberries: they burst and make a sauce that tastes like pie filling without the work.
Apples: great if you want something sturdier and more fall flavored.
Cherries: sweet or tart both work, but you might want a little extra sugar for tart ones.
Strawberries: best mixed with another fruit because they can get a little watery alone.
Pears: gentle and buttery, especially with a touch of ginger.
Fresh fruit is amazing when it is in season, but frozen fruit is totally valid. I use frozen blueberries all the time. If you use frozen, do not thaw first. Just add a tiny bit more cornstarch since frozen fruit releases more juice.
Also, for a small snack style blueberry moment, these blueberry and lemon zest cottage cheese bites are surprisingly good and super quick.
Tips for the Perfect Fruit Filling
This is where most people get tripped up. Not because it is hard, but because fruit is unpredictable. One batch of peaches is sweet and juicy, another batch is kind of bland and dry. Here is how I keep it consistent.
1) Taste your fruit first. I know it sounds obvious, but it makes a big difference. If the peaches taste dull, add a little more sugar and a small squeeze of lemon. Lemon makes the fruit taste more like itself.
2) Use cornstarch, not too much. Cornstarch thickens the juices so you get a spoonable filling instead of fruit soup. For an 8×8 dish, 1 to 1 and a half tablespoons usually does it. If your fruit is extra juicy or frozen, lean closer to 1 and a half.
3) Do not skip salt. Just a pinch in the filling and a pinch in the topping. It makes everything taste brighter.
4) Let it rest after baking. If you cut in immediately, the juices are still super loose. Resting 15 to 20 minutes helps it thicken and makes serving way less messy.
5) Watch for bubbling edges. That bubbling is your sign the filling is hot enough and the cornstarch is doing its job.
Additional Fruit Dessert Ideas
If you are on a fruit dessert kick, I get it. Once you make Blueberry Peach Crumble and realize how easy it is, you start looking around like, what else can I crumble, bake, or glaze?
Here are a few ideas I actually make at home:
Berry crisp: Use a mix of blueberries, raspberries, and blackberries. Add a little extra sugar if your berries are tart.
Apple cinnamon crumble: Thin sliced apples plus cinnamon and a tiny pinch of nutmeg. It smells unreal.
Peach raspberry crumble: Swap half the blueberries for raspberries for a brighter, tangier filling.
Plum crumble: Plums get super jammy and a little tart. Great with vanilla ice cream.
And if you want something more like a baked breakfast treat, these flaky blueberry biscuits with zesty lemon glaze are such a fun change from muffins.
Common Questions
Can I use canned peaches?
Yes. Drain them well and pat them a bit dry. Since canned peaches are usually sweet, start with less sugar and adjust.
Do I have to peel the peaches?
Nope. I usually do not. The peel softens a lot when baked. If you hate the texture, peel them, but it is optional.
Why is my crumble topping not crispy?
Most likely the butter was too warm or the crumble needed a few more minutes. Use cold butter, do not press the topping down, and bake until it is properly golden.
Can I make it ahead?
Yes. You can assemble it, cover it, and refrigerate for a few hours before baking. Add 5 to 10 minutes to the bake time since it starts cold.
What if my filling is too runny?
Let it cool longer, first. If it is still runny, next time use a bit more cornstarch or reduce very juicy fruit slightly.
A sweet little wrap up before you bake
If you want a dessert that feels comforting, simple, and crowd friendly, Blueberry Peach Crumble is hard to beat. The fruit turns glossy and sweet, the topping gets crisp, and your kitchen smells like something really good is happening. If you want to compare a few variations, I also like checking out Blueberry Peach Crumble – Two Peas & Their Pod, Blueberry Peach Crumble – Oh Sweet Basil, and Blueberry Peach Crumble – Chef Not Required… to see how others tweak the topping and sweetness. Bake it once, take a bite warm with ice cream, and you will get why I keep coming back to it. Let me know if you try it with a different fruit mix because I love hearing what works in your kitchen. 
Blueberry Peach Crumble
Ingredients
Fruit Filling
- 4 cups Peaches, sliced Fresh or thawed frozen
- 2 cups Blueberries Fresh or frozen
- 1/2 cup Sugar Adjust based on fruit sweetness
- 1 tablespoon Lemon juice
- 1 tablespoon Cornstarch To thicken the juices
- 1 pinch Salt Add to fruit filling
Crumble Topping
- 1 cup Old fashioned oats
- 1 cup All purpose flour
- 1/2 cup Brown sugar
- 1 pinch Salt Add to crumble topping
- 1 teaspoon Cinnamon Optional
- 1/2 cup Butter Cold, cut into small pieces
Instructions
Preparation
- Preheat your oven to 350 F. Lightly butter your baking dish.
- In a big bowl, toss the peaches and blueberries with sugar, lemon juice, cornstarch, and a pinch of salt. Pour the fruit mixture into the dish.
- In another bowl, mix oats, flour, brown sugar, salt, and cinnamon. Incorporate the cold butter and rub until it resembles chunky crumbs.
- Sprinkle the crumble topping evenly over the fruit without packing it down.
Baking
- Bake for about 40 to 50 minutes until the top is deep golden and the fruit is bubbling. Cover with foil if it browns too quickly.
- Let it rest for 15 to 20 minutes before serving.