Triple Berry Crumb Bars

With a blend of mixed berries and a buttery golden lid, these triple berry crumb bars taste like the best berry pie. The bars are delicious unadorned to fully savor the jammy berry filling and golden crumb topping; I also love them topped with a scoop of vanilla ice cream or drizzled with lemon glaze. Recipe makes 16 bars (and easily doubles!).

Triple Berry Crumb Bars

The Best Berry Crumb Bars

Even better than pie, these mixed berry crumb bars are forgiving and flexible – use any blend of fresh berries you love (my favorite combination is a mix of blackberries, raspberries, and blueberries).

If you’re serving a crowd, simply double the recipe and bake in a 13 x 9-inch baking pan (and then prepare to dig in!).

Triple Berry Crumb Bars

How to make berry crumb bars:

  • The crust and crumbs are one simple dough that comes together in under 5 minutes (thank you, melted butter!).
  • To make the dough, whisk together melted butter, sugar, brown sugar, vanilla, and lemon zest in a large bowl until combined. Whisk together flour, baking soda, and salt in a medium bowl; add to butter mixture and fold in until incorporated.
  • Reserve 3/4 cup of the dough for the crumb topping (keep chilled), and press the remaining dough evenly and firmly into the prepared baking pan.
  • Bake the crust for 14 to 16 minutes, until lightly golden and set. Cool the crust slightly before adding the filling and reserved crumbs.
  • To make the berry filling, combine sugar, salt, and arrowroot starch (or cornstarch) in a medium bowl. Add berries and lemon juice, tossing gently to combine. Spoon mixture over cooled crust and crumble reserved dough over filling.
  • Continue baking until the topping is golden and the berry filling is slightly bubbly, another 40 to 45 minutes. Let bars cool completely before slicing and serving.
Triple Berry Crumb Bars

More favorite berry desserts:

Did you try this Berry Crumb Bar Recipe? Let me know by leaving a comment and rating below!

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Triple Berry Crumb Bars

Triple Berry Crumb Bars

  • Author: Laura Kasavan
  • Prep Time: 20 minutes
  • Cook Time: 55 minutes
  • Total Time: 1 hour 15 minutes
  • Yield: 16 bars
  • Category: Dessert
  • Method: Bake
  • Cuisine: American
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Description

Triple berry crumb bars with a golden crumb topping make the perfect dessert! These simple and delicious mixed berry crumb bars taste like the best pie – serve with vanilla ice cream! Recipe makes 16 bars.


Ingredients

Crust & Crumbs

  • 3/4 cup unsalted butter, melted
  • 1/2 cup sugar
  • 1/4 cup light brown sugar
  • 2 tsp vanilla extract
  • 1 tsp lemon zest
  • 2 cups flour
  • 1/4 tsp baking soda
  • 1/4 tsp salt

Filling

  • 3/4 cup sugar
  • 1/8 tsp salt
  • 2 Tbsp arrowroot starch (or 1 1/2 Tbsp cornstarch)
  • 1/2 cup blackberries, halved
  • 3/4 cup raspberries
  • 3/4 cup blueberries
  • 1/2 Tbsp fresh lemon juice

Instructions

  1. Preheat oven to 350°F and line an 8-inch square baking pan with parchment paper. Whisk together melted butter, sugar, brown sugar, vanilla, and lemon zest until combined.
  2. Whisk together flour, baking soda, and salt in a medium bowl; add to butter mixture and fold in until incorporated. Reserve 3/4 cup of dough for topping (keep chilled); press remaining dough evenly into bottom of prepared pan. Bake crust for 14 to 16 minutes, until lightly golden and set. Transfer to a wire rack and cool for 15 minutes.
  3. For the filling, combine sugar, salt, and arrowroot starch in a medium bowl. Add berries and lemon juice, tossing gently to combine. Spoon mixture over cooled crust and crumble reserved dough over filling.
  4. Bake for another 40 to 44 minutes, or until topping is golden and filling slightly bubbly. Cool completely in pan on a wire rack. Just before cutting, chill in the freezer for 10 minutes. Carefully lift parchment and place bars on a cutting board; cut into squares with a sharp knife.

Notes

Filling: Any blend of 2 cups of berries can be used for the filling.

Gluten Free Bars: Use your favorite 1-1 gluten-free flour.

Larger Batch: For a larger batch of crumb bars, double the recipe and bake in a 9 x 13-inch rectangular baking pan.

Keywords: Berry, Berries, Crumb Bars, Blackberry, Raspberry, Blueberry

Triple Berry Crumb Bars

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12 Comments

  1. These bars are so buttery and delicious! The crust/crumble comes together super easily and the mixed berry filling is easy to tweak with whatever berries I have on hand.

  2. Can you use frozen berries? How long will these stay fresh? And how should they be stored?

    1. Hi Gretchen! Yes you can use frozen berries (toss the frozen berries with the other filling ingredients) and proceed with the recipe. Once the bars are baked and fully cooled, store them in the refrigerator for 2 to 3 days.

  3. Between this delicious looking bars and your glazed blueberry bites, I’m got myself covered for the next couple of holiday gatherings. Thanks so much for the inspiration.

  4. Ah, as soon as I saw these I knew I needed to make them asap! Memorial day weekend will be the perfect excuse too! You know me and berries…can’t get enough!

  5. These bars sound like a party in a mouth, and they look utterly pretty dear Laura!! I want one now!!!! 🙂

  6. You can never go wrong with a great crumb bar! So perfect for so many occasions! Loving all the berries 🙂

  7. A fabulous array of seasonal berries! So much easier to make than pie and just as vivid in satisfying flavor.

  8. Perfect for the upcoming summer holidays Laura! I can never, ever pass up a fruit crumb bar!