Can I use frozen berries?

Yes, just make sure to thaw them in a colander to drain any excess water. Then use as instructed.

Can I use different berries?

For the fresh fruit, I suggest sticking with raspberries and blackberries as these release a similar amount of juices. With that being said, you can choose to use all raspberries or all blackberries. For the preserves, use any flavor you like!

Can I use old fashioned oats instead of quick oats?

Unfortunately not, as old fashioned oats absorb liquid at a different capacity than quick oats.

Can this recipe be made vegan/dairy free?

Absolutely! Just swap the butter with plant-based butter and you're good to go.

Can this recipe be made gluten free?

I haven't tested it, but I think this recipe could work well with a cup for cup gluten free baking flour. Also make sure to use certified gluten free oats.

Can I use strawberry jam instead of preserves?

You can, but preserves are preferred for their texture and sweetness.

How do you store crumble bars?

Once the bars have baked and cooled, slice and store in a container in the refrigerator. They'll keep for about 5 days.

Can this recipe be doubled for a 9x13 dish?

I think that could work! I suggest increasing the bake time by about 5-10 minutes.

Brown Sugar Berry Crumble Bars

★★★★★

5 from 8 reviews

Author: Jenna Barnard
Total Time: 2 hours
Yield: 12 bars

Description

These berry crumble bars have the most delicious and jammy triple berry filling with a sweet and buttery brown sugar crumble! They’re so quick and easy to make and are the perfect way to celebrate berry season.

Ingredients

Brown Sugar Crumble

1 1/2 cups (195g) all purpose flour
1 1/4 cups (125g) quick oats
3/4 cup (150g) light brown sugar, packed
1/2 tsp baking powder
1/2 tsp kosher salt
3/4 cup unsalted butter, melted (regular or plant-based)

Triple Berry Filling

1 cup fresh blackberries*, divided (3/4 cup, 115g / 1/4 cup, 35g)
1 cup fresh raspberries*, divided (3/4 cup, 105g / 1/4 cup, 28g)
2 tbsp light brown sugar, packed
2 tbsp cornstarch
2 tsp lemon zest (about 1 lemon)
2 tbsp lemon juice (about 1 lemon)
1 tsp vanilla extract
1/3 cup (110g) strawberry preserves

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Instructions

Brown Sugar Crumble

Preheat the oven to 350F and grease an 8×8 baking pan. Line all sides with parchment paper and set aside.
In a medium bowl, mix together the flour, oats, brown sugar, baking powder, and salt.
Pour in the melted butter and mix to combine. It should turn very crumbly but not too dry.
Press about 2/3 of the mix into the bottom of the baking pan.
Tightly pack the crust and bake for 10 minutes. Place the remaining crumble in the refrigerator.

Triple Berry Filling

While the crust bakes, make the filling.
In a bowl, add 3/4 cup raspberries, 3/4 cup blackberries, and brown sugar. Give the berries a rough mash, making sure to mash each berry at least once with a fork.
Then mix in the cornstarch, zest, lemon juice, vanilla, and preserves.
Pour the filling over the prebaked crust and scatter the remaining berries on top.
Top with the rest of the crumble and bake for 30-35 minutes. The surface should look slightly darker and the edges will be a tiny bit bubbly.
Allow the bars to cool at room temperature for about 90 minutes or in the refrigerator for about half that time.
Then lift out of the pan, slice, and enjoy!

Equipment

8×8 Baking Pan

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Notes

*FROZEN BERRIES – Frozen berries can be used for this recipe. Thaw the berries in a colander to drain any excess liquid. Then continue with the recipe as instructed.

Prep Time: 30 minutes
Cooling Time: 1 hour
Cook Time: 30 minutes
Category: Dessert
Method: Baking
Cuisine: American

Keywords: berry crumble bars, fruit crumble bars, raspberry crumble bars, blackberry crumble bars, crumble bar recipe, berry crumble bar recipe, brown sugar crumble bars

Find it online: https://butternutbakeryblog.com/brown-sugar-berry-crumble-bars/

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