Lemon Crumb Bars – The Best Lemon Bar Recipe!

If you’re searching for an easy dessert to share that’s bursting with fresh, citrusy flavor, these Lemon Crumb Bars are the answer. With a buttery, crumbly base and topping, and a luscious lemon curd filling, these bars strike the perfect balance of sweet and tangy. They’re simple to make yet look and taste bakery-worthy, making them an ideal choice for potlucks, family dinners, or as a delightful lemon fall dessert.

Whether you call them Lemon Crunch Bars, Lemon Lime Bars, or Lemon Curd Squares, this recipe celebrates the bright, refreshing flavor of fresh lemons in every bite.

Why You’ll Love These Lemon Crumb Bars

• Versatile: Great for any occasion, from casual snacking to holiday spreads.
• Uses Fresh Lemons: Perfect for showcasing the vibrant flavor of fresh lemons.
• Simple Ingredients: Most items are pantry staples, making this recipe convenient to whip up anytime.
• Crowd-Pleasing: A hit with kids and adults alike thanks to the irresistible crumbly texture and tangy filling.

Ingredients

For the Crumb Layers

• 1 ¾ cups all-purpose flour
• 1 cup old-fashioned oats
• ¾ cup granulated sugar
• ½ cup light brown sugar, packed
• 1 tsp baking powder
• ½ tsp salt
• ¾ cup unsalted butter, melted
• 1 tsp vanilla extract

For the Lemon Curd Filling

• 4 large egg yolks
• 1 cup granulated sugar
• ½ cup freshly squeezed lemon juice (from 3–4 lemons)
• 2 tsp lemon zest
• ¼ cup unsalted butter, cut into small cubes

Step-by-Step Instructions

1. Make the Crumb Mixture

1. Preheat your oven to 350°F (175°C). Line an 8×8-inch baking pan with parchment paper, leaving some overhang for easy removal.
2. In a large mixing bowl, combine the flour, oats, granulated sugar, brown sugar, baking powder, and salt. Stir until well mixed.
3. Pour in the melted butter and vanilla extract. Mix until the ingredients form a crumbly, sand-like texture.

2. Prepare the Lemon Curd Filling

1. In a medium saucepan, whisk together the egg yolks, granulated sugar, lemon juice, and lemon zest until smooth.
2. Cook the mixture over medium-low heat, stirring constantly, until it thickens enough to coat the back of a spoon (about 8–10 minutes).
3. Remove from heat and stir in the cubed butter, one piece at a time, until fully melted and incorporated. Let the lemon curd cool slightly before assembling the bars.

3. Assemble the Lemon Crumb Bars

1. Take two-thirds of the crumb mixture and press it firmly into the bottom of the prepared pan to create an even base.
2. Spread the lemon curd filling evenly over the crumb layer, making sure it reaches the edges.
3. Sprinkle the remaining crumb mixture over the top of the lemon curd, pressing it gently to adhere.

4. Bake the Bars

1. Bake in the preheated oven for 30–35 minutes, or until the top crumb layer is lightly golden.
2. Remove from the oven and let the bars cool completely in the pan. For cleaner slices, refrigerate for 1–2 hours before cutting.

Tips for Perfect Lemon Crumb Bars

1. Fresh Lemons Are Key: Use freshly squeezed lemon juice and zest for the best flavor. Bottled lemon juice won’t provide the same bright, tangy taste.
2. Don’t Skip the Chilling: Chilling the bars before slicing helps the layers set and makes them easier to cut.
3. Customize the Citrus: Add a splash of lime juice or zest for a Lemon Lime Bar variation.
4. Thicker Bars: For a thicker dessert, double the recipe and bake in a 9×13-inch pan.

Serving Suggestions

These Lemon Crumb Bars are delicious on their own, but here are a few ways to elevate your dessert:

• Dust with Powdered Sugar: A light dusting adds a touch of sweetness and elegance.
• Serve with Fresh Berries: Blueberries, raspberries, or strawberries pair beautifully with the tangy lemon flavor.
• Top with Whipped Cream: Add a dollop of whipped cream for extra indulgence.

Variations to Try

• Coconut Lemon Bars: Add shredded coconut to the crumb mixture for a tropical twist.
• Lemon Raspberry Bars: Swirl raspberry jam into the lemon curd before adding the top crumb layer.
• Gluten-Free Option: Use a gluten-free flour blend and certified gluten-free oats to make these bars gluten-free.
• Vegan Lemon Bars: Replace the butter with coconut oil, and use a vegan lemon curd recipe for a plant-based version.

Storage Tips

1. Refrigerator: Store the bars in an airtight container in the fridge for up to 5 days.
2. Freezer: These bars freeze well! Wrap individual squares in plastic wrap, place them in a freezer-safe container, and freeze for up to 2 months. Thaw in the refrigerator before serving.

Why These Bars Are a Must-Try

• Easy to Make: A no-fuss recipe that delivers professional-quality results.
• Bright and Refreshing: Perfect for highlighting the flavors of fresh lemons.
• Ideal for Any Occasion: Great for potlucks, bake sales, or just a sweet treat at home.