Can I use frozen blueberries for lemon blueberry crumb bars?

Yes, you can use frozen blueberries! There's no need to thaw them first. Just toss them with a little flour before adding them to the filling to prevent the bars from becoming too soggy.

How do I store lemon blueberry crumb bars?

Store leftover lemon blueberry crumb bars in an airtight container at room temperature for up to 2 days, or in the refrigerator for up to 5 days. They can also be frozen for longer storage.

How do I prevent the crust from being soggy?

To prevent a soggy crust, partially bake the crust before adding the filling. Also, toss the blueberries with a little flour or cornstarch to absorb excess moisture.

Can I make lemon blueberry crumb bars ahead of time?

Yes, you can! These bars are great for making ahead. Bake them as directed, let them cool completely, and then store them in an airtight container at room temperature or in the refrigerator.

What gives lemon blueberry crumb bars their lemon flavor?

The lemon flavor comes from both lemon zest and lemon juice added to either the filling or the crust (or both!) providing a bright, citrusy flavor.

How do I know when my lemon blueberry crumb bars are done?

The bars are done when the crumb topping is golden brown and the filling is bubbly. A toothpick inserted into the center of the filling should come out mostly clean.

Lemon Blueberry Crumb Bars: Your New Favorite Easy Dessert Recipe 2026

Lemon Blueberry Crumb Bars

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These bars feature a buttery shortbread crust, a layer of juicy blueberries brightened with fresh lemon, and a generous crumb topping. They are a simple, doable dessert that feels special enough for company but easy enough for a weeknight treat.

Author: Harmony
Prep Time: 15min
Cook Time: 45min
Total Time: 1h
Yield: 16 bars 1x
Category: dessert
Method: baking
Cuisine: American

Ingredients

Scale

2 cups all-purpose flour
1 cup old-fashioned rolled oats
1 cup granulated sugar
1 teaspoon baking powder
1/2 teaspoon salt
1 cup (2 sticks) cold unsalted butter, cubed
1 large egg
3 cups fresh or frozen blueberries
1/2 cup granulated sugar
3 tablespoons all-purpose flour
Zest of 1 large lemon
Juice of 1 large lemon (about 3 tablespoons)
1 teaspoon vanilla extract

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Instructions

Preheat oven to 375°F (190°C). Line an 8×8 or 9×9 inch baking pan with parchment paper, leaving an overhang on two sides.
In a large bowl, whisk together 2 cups flour, oats, 1 cup sugar, baking powder, and salt.
Add the cold, cubed butter and the egg. Use a pastry cutter, two forks, or your fingers to work the mixture until it resembles coarse crumbs that hold together when pinched.
Set aside about 1 1/2 cups of the crumb mixture for the topping. Press the remaining mixture firmly and evenly into the bottom of the prepared pan.
In a separate bowl, gently toss blueberries with 1/2 cup sugar, 3 tablespoons flour, lemon zest, lemon juice, and vanilla extract until evenly coated.
Spread the blueberry filling evenly over the pressed crust.
Sprinkle the reserved crumb mixture evenly over the top of the blueberries.
Bake for 40-50 minutes, or until the topping is deep golden brown and the blueberry filling is bubbling around the edges.
Let the pan cool completely on a wire rack. Use the parchment paper to lift out the slab and cut into squares.

Notes

Use cold butter for the best crumb texture. Do not skip the parchment paper for easy removal. Let the bars cool completely before cutting to ensure clean slices. Frozen blueberries work well; no need to thaw. Store in an airtight container at room temperature for up to 2 days, in the fridge for up to 5 days, or freeze for up to 3 months.

Nutrition

Serving Size: 16
Calories: 280
Sugar: 25
Sodium: 100
Fat: 12
Saturated Fat: 7
Unsaturated Fat: 4
Trans Fat: 0
Carbohydrates: 42
Fiber: 2
Protein: 3
Cholesterol: 40

Find it online: https://www.homestyletable.com/lemon-blueberry-crumb-bars/