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Delicious Peach Crumble Bars with Oat Topping ready to be enjoyed.

Peach Crumble Bars with Oat Topping

These Peach Crumble Bars with Oat Topping are sweet, cozy, and easy to make, featuring a buttery crust, jammy peach filling, and a crunchy oat topping that’s perfect for sharing.
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Prep Time 15 minutes
Cook Time 45 minutes
Total Time 1 hour
Servings: 12 bars
Course: Dessert, Snack
Cuisine: American
Calories: 220
Ingredients Method Notes

Ingredients
  

Crust and Topping
  • 1 cup All-purpose flour Helps the crust and crumble hold their shape.
  • 1 cup Old fashioned oats Do not use quick oats for texture.
  • 1/2 cup Brown sugar Gives a warm caramel note.
  • 1/4 cup Granulated sugar Balances the fruit and enhances the filling's brightness.
  • 1 tsp Baking powder Provides lift to the base.
  • 1/4 tsp Salt Enhances the overall flavor.
  • 1/2 cup Butter, melted Makes the preparation easy and adds richness.
  • 1 large Egg Binds the crust layer.
Peach Filling
  • 4 cups Peaches, chopped Fresh or thawed frozen peaches work. Drain well if using frozen.
  • 1/4 cup Granulated sugar To sweeten the peach filling.
  • 1 Tbsp Lemon juice Wakes up the flavor of the peaches.
  • 2 Tbsp Cornstarch Thickens the filling for clean slices.
  • 1/2 tsp Cinnamon (optional) Adds warmth to the flavor.

Method
 

Preparation
  1. Preheat your oven to 350°F (175°C). Line a 9x13 pan with parchment paper and lightly grease the exposed edges.
  2. In a large bowl, stir together flour, oats, brown sugar, baking powder, and salt.
  3. Pour in melted butter and add the egg. Mix until it resembles thick, sandy crumbs that clump when squeezed.
  4. Press about two thirds of the mixture firmly into the bottom of the pan.
Making the Filling
  1. In another bowl, combine chopped peaches, granulated sugar, lemon juice, cornstarch, and cinnamon (if using). Stir until cornstarch is evenly distributed.
  2. Spread the peach filling evenly over the crust, then sprinkle the remaining oat mixture on top without pressing down.
Baking
  1. Bake for 35 to 45 minutes, or until the top is golden and bubbling around the edges.
  2. Allow to cool at room temperature, then chill to make slicing easier.

Notes

These bars can be made with various fruits like nectarines or plums. For a crunchier topping, add chopped nuts. Store in an airtight container for up to 5 days in the fridge or freeze for up to 2 months.