This easy blueberry peach crumble is a simple summer dessert with a juicy fruit filling and a crisp, buttery oat topping. It is less fussy than pie but still delivers warm cinnamon peaches, burst blueberries, and a golden crumbly finish.

Why This Blueberry Peach Crumble Is the Perfect Summer Dessert

Peaches and blueberries are a naturally delicious combination: peaches add soft sweetness while blueberries bring a little tang and a jewel-toned sauce. The oat topping turns crisp and golden in the oven, giving each spoonful contrast against the tender fruit.

This dessert comes together in one baking dish, makes the kitchen smell wonderful, and is best served warm with vanilla ice cream. It is a practical choice for casual summer meals, potlucks, and weekend baking.

Ingredients for Peach and Blueberry Crumble

Use ripe peaches that yield slightly when pressed but are not mushy. Peeling is optional; peach skins soften as the crumble bakes. Blueberries can be fresh or frozen, though frozen berries may release extra juice.

Cornstarch thickens the fruit juices so the filling is spoonable rather than watery. The topping uses oats, flour, brown sugar, cinnamon, salt, and cold butter. Cold butter creates the crumbly texture as it melts in the oven.

How to Make a Buttery Oat Crumble Topping

Stir oats, flour, brown sugar, cinnamon, and salt together. Cut in cold butter with a pastry cutter, fork, or fingertips until the mixture forms coarse crumbs with some pea-size pieces remaining.

Do not melt the butter for this topping. Melted butter can make it dense rather than crumbly.

Fresh vs. Frozen Fruit for Crumble

Fresh fruit gives the brightest summer flavor, but frozen blueberries work well without thawing. If using frozen peaches, add an extra teaspoon of cornstarch because they tend to release more liquid.

Taste the fruit before adding sugar. Very sweet summer peaches may need less sugar, while tart fruit can use the full amount.

How to Tell When Fruit Crumble Is Done

Bake until the topping is golden brown and fruit juices bubble around the edges. Bubbling is important because it signals that the cornstarch has heated enough to thicken the filling.

Let the crumble rest for at least 15 minutes after baking. The fruit filling thickens further as it cools.

Serving and Storage Suggestions

Serve warm with vanilla ice cream, whipped cream, or Greek yogurt for a brunch-style serving. Refrigerate leftovers in a covered container for up to four days. Reheat individual portions in the microwave or warm the whole dish in a low oven.