![Triple Berry Oat Crumb Bars](https://www.handmadecharlotte.com/wp-content/uploads/2019/07/berry-crumb-bars_finished-3.690.jpg)
This simple recipe for triple berry crumb bars is a great way to take a classic summer crumble on the go. Just as sweet and delicious as a classic fruit crisp or crumble, these oat crumb bars have a sturdy oat crust that makes them easy to transport wherever your summer adventures take you! They’re perfect for everything from picnics to cookouts.
![Triple Berry Oat Crumb Bars](https://www.handmadecharlotte.com/wp-content/uploads/2019/07/berry-crumb-bars_finished-1.690.jpg)
These berry oat crumb bars were made with a mix of blueberries, raspberries, and blackberries. Use the same combination or whichever berries you have on hand! If you’d like to use frozen berries, allow fruit to thaw completely in a colander so that excess juices drain as the fruit thaws.
ingredients:
Makes: 16 servings
crust:
- 2 1/2 cups old fashioned rolled oats
- 1 cup all-purpose flour
- 1 cup brown sugar (packed)
- 1 teaspoon sea salt
- 16 tablespoons cold unsalted butter, rough chopped
Fruit:
- 14 ounces (about 2 1/2 cups) fresh berries (I used a mix of raspberry, blueberry, and blackberry)
- 6 tablespoons sugar
- 2 tablespoons cornstarch
- Zest of 1 lemon
- Pinch sea salt
Directions:
Preheat oven to 350 degrees F. Line an 8 x 8-inch square baking pan with parchment and butter the sides.
In a small bowl, toss to combine berries, sugar, cornstarch, zest, and sea salt. Set aside while you prep the other ingredients.
![Triple Berry Oat Crumb Bars](https://www.handmadecharlotte.com/wp-content/uploads/2019/07/berry-crumb-bars_step-1.690.jpg)
To make the oat crumble, pulse to combine 2 cups oats until they have a sandy texture. Add flour, sugar, and sea salt, and pulse. Add butter; pulse several times to fully incorporate. Add remaining 1/2 cup oats and pulse 2 times.
Reserve 1 cup of the oat crumble mixture. With your fingers, roll reserved oat mixture into 1/2-inch clumps and spread on a small plate or rimmed baking sheet and chill in freezer 20 minutes.
![Triple Berry Oat Crumb Bars](https://www.handmadecharlotte.com/wp-content/uploads/2019/07/berry-crumb-bars_step-2.690.jpg)
Meanwhile, press the remaining oat mixture into prepared baking pan, using the flat bottom of a measuring cup or glass to press crust firmly into place.
![Triple Berry Oat Crumb Bars](https://www.handmadecharlotte.com/wp-content/uploads/2019/07/berry-crumb-bars_step-3.690.jpg)
Spoon fruit and any juices over bottom crust. Top with chilled topping.
![Triple Berry Oat Crumb Bars](https://www.handmadecharlotte.com/wp-content/uploads/2019/07/berry-crumb-bars_step-4.690.jpg)
Bake until topping is golden and fruit filling is bubbling, 55 – 65 minutes. Cool 3 hours and then chill completely in the fridge before slicing. (If you’d like to slice into it sooner, the crumb bars will be delicious, but have more of a soft fruit crisp-like texture.)
With a large, sharp knife, slice into 16 (2-inch) bars, serve, and enjoy! Leftover bars can be kept covered in the fridge for up to 3 days.
![Triple Berry Oat Crumb Bars](https://www.handmadecharlotte.com/wp-content/uploads/2019/07/berry-crumb-bars_finished-2.690.jpg)
![Triple Berry Oat Crumb Bars](https://www.handmadecharlotte.com/wp-content/uploads/2019/07/berry-crumb-bars_finished-4.690.jpg)
Enjoy!