Lemon Blueberry Crumb Bars

Introduction

These Lemon Blueberry Crumb Bars are a bright and refreshing dessert packed with juicy blueberries and a hint of zesty lemon. With a buttery crust, vibrant fruit filling, and a golden crumb topping, every bite delivers the perfect balance of sweet and tangy flavor. This Lemon Blueberry Crumb Bars recipe is ideal for spring and summer baking, offering a simple yet beautiful treat that’s easy to slice and serve. Whether you’re hosting a gathering or just craving something fresh and fruity, these bars are sure to become a favorite.

Why You’ll Love This Recipe

• Perfect balance of sweet blueberries and tangy lemon
• Buttery crust doubles as a crumb topping
• Easy to make with simple pantry ingredients
• Great for picnics, potlucks, or dessert trays
• Make-ahead friendly and easy to store
• Bright, fresh flavor that feels light yet satisfying

Ingredients Needed

For the Crust & Crumble

• 1 ½ cups all-purpose flour
• ¾ cup granulated sugar
• ¼ teaspoon salt
• ¾ cup unsalted butter, cold and cubed

For the Lemon Blueberry Filling

• 3 cups fresh blueberries
• ½ cup granulated sugar
• 2 tablespoons cornstarch
• 1 tablespoon lemon zest
• 2 tablespoons lemon juice
• 1 teaspoon vanilla extract

Step-by-Step Instructions

1. Preheat oven to 375°F and line an 8×8-inch baking pan with parchment paper.
2. In a bowl, combine flour, sugar, and salt. Cut in cold butter until crumbly.
3. Press two-thirds of the mixture into the bottom of the pan to form the crust.
4. Bake for 12–15 minutes until lightly golden.
5. In another bowl, mix blueberries, sugar, cornstarch, lemon zest, lemon juice, and vanilla.
6. Spread the filling evenly over the crust.
7. Sprinkle the remaining crumb mixture over the top.
8. Bake for 35–40 minutes until golden and bubbly. Cool completely before slicing.

Tips for Success

• Use fresh lemon juice and zest for the best flavor
• Keep butter cold to achieve a perfect crumb texture
• Don’t skip pre-baking the crust to avoid soggy bars
• Let bars cool fully to help the filling set properly
• Toss blueberries gently to keep them intact
• Adjust sugar based on the sweetness of your berries

Variations & Substitutions

• Swap blueberries with raspberries or blackberries
• Use frozen blueberries (do not thaw before using)
• Add a light glaze made from powdered sugar and lemon juice
• Try a gluten-free flour blend for a gluten-free version
• Mix in a handful of shredded coconut for texture

Serving Suggestions

• Serve chilled for a refreshing treat
• Pair with vanilla ice cream or whipped cream
• Dust with powdered sugar before serving
• Add a drizzle of lemon glaze for extra sweetness
• Serve as part of a brunch dessert spread

Storage & Reheating

Store Lemon Blueberry Crumb Bars in an airtight container in the refrigerator for up to 4 days. For longer storage, freeze the bars for up to 2 months. To serve, thaw in the refrigerator overnight or enjoy slightly chilled. You can also warm them in the microwave for 10–15 seconds if desired.

Frequently Asked Questions

Can I use frozen blueberries?
Yes, use them straight from frozen without thawing to prevent excess moisture.

Can I make this ahead of time?
Yes, these bars are great for making a day in advance.

How do I thicken the filling?
Cornstarch helps create a thick, jam-like consistency as the bars bake.

Can I make this gluten-free?
Yes, substitute with a 1:1 gluten-free flour blend.

Why are my bars too soft?
They may need more cooling time to fully set before slicing.

platehacks

Lemon Blueberry Crumb Bars

These Lemon Blueberry Crumb Bars combine a buttery crust and crumble topping with a vibrant blueberry filling infused with fresh lemon zest and juice. Sweet, tangy, and easy to make, they’re perfect for spring and summer desserts.

Print Recipe Pin Recipe

Prep Time 15 minutes mins

Cook Time 50 minutes mins

Total Time 1 hour hr 5 minutes mins

Servings: 9 bars

Course: Dessert

Cuisine: American

Calories: 270

Ingredients Equipment Method Notes

Ingredients

  

• 1 1/2 cups all-purpose flour
• 3/4 cup granulated sugar
• 1/4 tsp salt
• 3/4 cup unsalted butter, cold and cubed
• 3 cups fresh blueberries
• 1/2 cup granulated sugar
• 2 tbsp cornstarch
• 1 tbsp lemon zest
• 2 tbsp lemon juice
• 1 tsp vanilla extract

Equipment

• 8×8-inch baking pan
• parchment paper
• mixing bowls
• pastry cutter or fork
• oven

Method

 

1. Preheat oven to 375°F and line an 8×8-inch baking pan with parchment paper.
2. In a bowl, combine flour, sugar, and salt. Cut in cold butter until the mixture is crumbly.
3. Press two-thirds of the mixture into the bottom of the pan to form the crust.
4. Bake for 12–15 minutes until lightly golden.
5. In another bowl, mix blueberries, sugar, cornstarch, lemon zest, lemon juice, and vanilla extract.
6. Spread the filling evenly over the crust.
7. Sprinkle the remaining crumb mixture over the top.
8. Bake for 35–40 minutes until golden and bubbly. Cool completely before slicing.

Notes

Use fresh lemon juice and zest for the best flavor. Keep butter cold for a crumbly texture. Pre-bake the crust to prevent sogginess. Let bars cool completely before slicing to help the filling set. Frozen blueberries can be used without thawing.