Looking for a dessert that feels like sunshine in every bite? These Blueberry Lemon Crumble Bars are the answer! They combine juicy blueberries, bright lemon flavor, and a buttery oat crumble that’s both crisp and chewy. Whether you’re hosting brunch, prepping for a potluck, or simply want something sweet and refreshing, this easy bar recipe checks all the boxes.
🛒 Ingredients Breakdown
Let’s take a look at what you’ll need to bring this delicious recipe to life.
For the Crust and Crumble Topping:
- 1½ cups all-purpose flour
- 1½ cups old-fashioned oats
- ¾ cup granulated sugar
- ½ teaspoon baking powder
- ½ teaspoon salt
- 1 cup unsalted butter, melted
For the Lemon Filling:
- 1 (14 oz) can sweetened condensed milk
- ½ cup fresh lemon juice (about 2 lemons)
- 1 tablespoon lemon zest
- 2 egg yolks
For the Blueberry Layer:
- 2 cups fresh blueberries
- 1 tablespoon all-purpose flour
- 1 tablespoon granulated sugar
Tip: Frozen blueberries work just as well—no need to thaw them!
👩🍳 How to Make Blueberry Lemon Crumble Bars
Step 1: Prep the Oven & Pan
Start by preheating your oven to 350°F (175°C). Line a 9×13-inch baking pan with parchment paper for easy removal.
Step 2: Make the Crust
In a large bowl, combine the flour, oats, sugar, baking powder, and salt. Pour in the melted butter and mix until crumbly. The texture should resemble wet sand.
Step 3: Press the Crust
Firmly press about ⅔ of the oat mixture into the prepared pan to form the base layer. Set the rest aside for the topping.
Step 4: Whisk the Lemon Filling
In a separate bowl, mix the sweetened condensed milk, lemon juice, lemon zest, and egg yolks. Whisk until smooth and creamy. This adds the perfect tart balance to the sweet crumble.
Step 5: Add Blueberries
Toss the blueberries with flour and sugar. This helps them stay juicy and prevents them from sinking.
Step 6: Assemble
Pour the lemon filling over the crust, spread the blueberries evenly on top, then finish with the remaining crumble.
Step 7: Bake & Cool
Bake for 35–40 minutes or until the top is golden and the center is just set. Once done, allow the bars to cool completely before refrigerating for at least 2 hours. Slice into squares and serve chilled for best flavor and texture.
✅ Why You’ll Love This Recipe
Here are just a few reasons these bars might become your go-to dessert:
- Perfect balance of sweet and tart
- Easy to make ahead and store
- Crowd-pleasing and picnic-friendly
- Simple ingredients you already have on hand
🍽 Serving Suggestions
These bars pair beautifully with:
- A cup of tea or coffee in the afternoon
- A scoop of vanilla ice cream for dessert
- A brunch spread with other fruity pastries
You can even wrap them individually and pack them in lunchboxes!
💬 Variations & Tips
- Gluten-Free Swap: Use a gluten-free flour blend and certified gluten-free oats.
- Coconut Twist: Add shredded coconut to the crust for a tropical vibe.
- Extra Lemony: If you’re a lemon lover, add a bit more zest for a stronger citrus punch.
Pro Tip: Chill the bars overnight for easier slicing and an even better texture.
🔢 Nutrition Information (Per Bar)
| Nutrient | Approximate Amount |
|---|---|
| Calories | 250 |
| Carbohydrates | 35g |
| Fat | 10g |
| Protein | 4g |
| Fiber | 2g |
Nutrition may vary slightly depending on specific brands or ingredient swaps.
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✨ Final Thoughts
These Blueberry Lemon Crumble Bars are sunshine in dessert form—sweet, tangy, buttery, and oh-so-satisfying. They’re simple enough for beginner bakers but elegant enough to impress at any event. Once you try them, don’t be surprised if they disappear fast!
Got leftover blueberries? Use them in a smoothie or freeze them for your next dessert adventure!