
These Homemade Lemon Crumb Bars are the perfect treat for any occasion. With a creamy, tangy lemon filling nestled between a buttery brown sugar crust and a crumbly oat topping, these bars are simple to make and sure to delight your taste buds. Whether you’re hosting a gathering or just looking for a sweet snack at home, these lemon bars will impress with their delicious flavor and perfect texture.
Why You’ll Love This Homemade Lemon Crumb Bars
These bars stand out for several reasons that make them an ideal dessert choice.
- Easy to Make: The recipe is straightforward, requiring minimal effort while delivering maximum flavor.
- Delicious Flavor: The combination of tangy lemon and sweet crust makes each bite a delightful experience.
- Versatile Treat: Perfect for picnics, potlucks, or just a family dessert night.
- Perfect Texture: The contrast between the creamy filling and crumbly topping creates a satisfying mouthfeel.
- Make Ahead Option: These bars can be prepared in advance, making entertaining stress-free.
Tools and Preparation
Before you dive into the cooking process, gather your tools for success.
Essential Tools and Equipment
- 8×8-inch baking pan
- Mixing bowls (medium and large)
- Whisk
- Parchment paper or foil
- Wire rack
Importance of Each Tool
- Baking Pan: A sturdy pan ensures even baking of your lemon bars.
- Mixing Bowls: Different sizes help separate dry and wet ingredients effectively.
- Whisk: A whisk combines ingredients smoothly, vital for achieving that creamy lemon filling.
Ingredients
For the Crust and Topping:
- 1 cup all-purpose flour
- 1 cup old-fashioned oats
- 1/4 teaspoon salt
- 3/4 teaspoon baking soda
- 10 tablespoons unsalted butter, melted
- 1/2 cup light brown sugar, packed
- 1 teaspoon pure vanilla extract
For the Lemon Filling:
- 1 (14 oz) can sweetened condensed milk
- 2 tablespoons sour cream (or plain yogurt)
- 1 large egg yolk
- 1/4 cup freshly squeezed lemon juice
- 1 tablespoon finely grated lemon zest
- 1/2 teaspoon vanilla extract

How to Make Homemade Lemon Crumb Bars
Step 1: Preheat the Oven
Preheat the oven to 350°F (175°C). This ensures your bars bake evenly from the start.
Step 2: Prepare the Pan
Line an 8×8-inch baking pan with foil or parchment paper. Leave an overhang on two sides for easy removal later. Spray the lined pan with nonstick spray to prevent sticking.
Step 3: Make the Crust & Topping
In a medium bowl, whisk together the flour, oats, salt, and baking soda. In another large bowl, mix the melted butter, brown sugar, and vanilla extract until well combined. Stir in the dry ingredients until fully incorporated.
Step 4: Form the Crust
Set aside about 3/4 cup of this mixture for crumbling on top later. Press the remaining dough evenly into the bottom of your prepared pan. It will be quite buttery but that’s perfectly fine! Bake it in the preheated oven for about 10 minutes.
Step 5: Prepare the Lemon Filling
While your crust bakes, combine sweetened condensed milk, sour cream, egg yolk, lemon juice, lemon zest, and vanilla extract in a bowl. Whisk until smooth to create a luscious filling.
Step 6: Assemble & Bake
Once your crust is ready, pour the lemon filling over it. Spread it gently across since the crust is still soft. Crumble over the reserved dough mixture evenly on top. Bake for another 17-20 minutes or until golden and set.
Step 7: Cool & Serve
After baking, place your pan on a wire rack to cool completely. Once cooled, lift out using the overhanging parchment or foil. Slice into squares and enjoy!
How to Serve Homemade Lemon Crumb Bars
Serving Homemade Lemon Crumb Bars can elevate your dessert experience. These bars are versatile and can be enjoyed in various delightful ways. Here are some serving suggestions to enhance their flavor and presentation.
Pair with Fresh Berries
- Serve the bars alongside fresh strawberries, blueberries, or raspberries for a pop of color and added sweetness.
Dust with Powdered Sugar
- Lightly dust the top of the bars with powdered sugar before serving for a beautiful finish and an extra touch of sweetness.
Add Whipped Cream
- Top each bar with a dollop of whipped cream for a creamy contrast that complements the tangy lemon filling.
Serve with Vanilla Ice Cream
- A scoop of vanilla ice cream enhances the flavors and provides a creamy balance to the tartness of the lemon.
Drizzle with Lemon Glaze
- Create a simple lemon glaze by mixing powdered sugar with lemon juice, then drizzle it over the cooled bars for added citrus flavor.
Garnish with Lemon Zest
- Sprinkle some fresh lemon zest on top just before serving to emphasize the lemony goodness in these delicious bars.
How to Perfect Homemade Lemon Crumb Bars
To make sure your Homemade Lemon Crumb Bars turn out perfectly every time, consider these helpful tips.
- Use Fresh Ingredients: Always opt for fresh lemons and high-quality ingredients for the best flavor.
- Don’t Overmix: When combining wet and dry ingredients, mix just until combined to ensure a tender texture.
- Let Them Cool Completely: Allowing the bars to cool thoroughly before slicing helps maintain their structure.
- Adjust Sweetness: If you prefer less sweetness, reduce the amount of brown sugar in the crust or filling.
- Experiment with Flavors: Add a pinch of salt or use flavored yogurt for an interesting twist on the filling.
- Store Properly: Keep them in an airtight container in the refrigerator to maintain freshness and texture.

Best Side Dishes for Homemade Lemon Crumb Bars
Homemade Lemon Crumb Bars can be complemented by various side dishes that enhance their bright flavors. Here are some delightful options to consider:
- Fruit Salad
A refreshing mix of seasonal fruits adds color and balances the richness of the crumb bars. - Coconut Macaroons
Chewy coconut macaroons provide a sweet contrast that pairs well with the tangy lemon flavor. - Lemon Sorbet
A light lemon sorbet offers a cool, refreshing treat that echoes the flavors of your bars. - Mint Yogurt Dip
A mint-infused yogurt dip adds creaminess while providing a refreshing herbal note alongside dessert. - Cheese Plate
A selection of mild cheeses complements lemon flavors beautifully, adding richness to your dessert experience. - Coffee or Tea
Serving hot beverages like coffee or herbal tea enhances the enjoyment while balancing sweetness.
Common Mistakes to Avoid
When making Homemade Lemon Crumb Bars, it’s easy to run into a few common pitfalls. Here are some mistakes to watch out for:
- Skipping the Cooling Time: Allowing the bars to cool completely is crucial for the right texture. If you cut them too soon, they may fall apart.
- Using Fresh Lemon Juice: While fresh lemon juice is best, be careful not to use too much as it can overpower the filling. Stick to the recommended amount for balance.
- Not Measuring Ingredients Properly: Accurate measurements are key in baking. Use measuring cups and spoons specifically designed for dry and wet ingredients.
- Overmixing the Crust: Mixing the crust too much can lead to a tough texture. Combine just until everything is mixed well.
- Baking at Incorrect Temperature: Ensure your oven is properly preheated. An incorrect temperature can cause uneven baking or burnt edges.
Storage & Reheating Instructions
Refrigerator Storage
- Store in an airtight container.
- These Homemade Lemon Crumb Bars will stay fresh for up to 5 days in the fridge.
Freezing Instructions
- Wrap individual bars tightly in plastic wrap, then place them in a freezer-safe bag.
- They can be frozen for up to 3 months without losing flavor.
Reheating Instructions
- Oven: Preheat your oven to 350°F (175°C). Place bars on a baking sheet and warm for about 10 minutes.
- Microwave: Heat one bar at a time for about 15-20 seconds. Watch closely to avoid overheating.
- Stovetop: Place bars in a skillet over low heat, cover, and warm gently until heated through.

Frequently Asked Questions
How do I make my Homemade Lemon Crumb Bars more tangy?
You can add an extra tablespoon of lemon juice or zest to enhance the tartness of your filling.
Can I use gluten-free flour in this recipe?
Yes! You can substitute all-purpose flour with a gluten-free blend that measures cup-for-cup.
How long do Homemade Lemon Crumb Bars last?
These delicious bars will keep well in the refrigerator for up to five days when stored properly.
Can I customize the topping?
Absolutely! You can add nuts or coconut flakes to the crumb topping for added texture and flavor.
What’s the best way to serve these Lemon Crumb Bars?
Dust with powdered sugar before serving for an elegant touch!
Final Thoughts
Homemade Lemon Crumb Bars are a delightful treat that balances creamy lemon filling with a buttery crust and crumble. They are simple yet impressive, perfect for any occasion. Feel free to customize them by adding nuts or adjusting the sweetness level based on your preference!

Homemade Lemon Crumb Bars
Indulge in the delightful taste of Homemade Lemon Crumb Bars, a perfect treat that combines the tangy brightness of fresh lemons with a buttery, crumbly oat topping. This easy-to-make recipe features a creamy lemon filling nestled between a rich brown sugar crust, making it an ideal dessert for any occasion—be it family gatherings or casual snacking at home. With their vibrant flavor and satisfying texture, these bars are sure to impress your guests and satisfy your sweet cravings. Better yet, they’re simple enough for beginners to whip up!
- Total Time: 45 minutes
- Yield: Approximately 16 servings 1x
Ingredients
- 1 cup all-purpose flour
- 1 cup old-fashioned oats
- 1/4 teaspoon salt
- 3/4 teaspoon baking soda
- 10 tablespoons unsalted butter, melted
- 1/2 cup light brown sugar, packed
- 1 teaspoon pure vanilla extract
- 1 (14 oz) can sweetened condensed milk
- 2 tablespoons sour cream
- 1 large egg yolk
- 1/4 cup freshly squeezed lemon juice
- 1 tablespoon finely grated lemon zest
- 1/2 teaspoon vanilla extract
Instructions
- Preheat the oven to 350°F (175°C).
- Line an 8×8-inch baking pan with parchment paper. Spray with nonstick spray.
- In one bowl, mix flour, oats, salt, and baking soda; in another bowl, combine melted butter, brown sugar, and vanilla.
- Combine wet and dry ingredients until mixed; set aside part for topping.
- Press remaining mixture into the pan and bake for 10 minutes.
- In a separate bowl, whisk together sweetened condensed milk, sour cream, egg yolk, lemon juice, zest, and vanilla until smooth.
- Pour lemon filling over baked crust and top with reserved crumbs; bake for another 17-20 minutes until golden.
- Cool completely before slicing into squares.
- Prep Time: 15 minutes
- Cook Time: 30 minutes
- Category: Desserts
- Method: Baking
- Cuisine: American
Nutrition
- Serving Size: 1 serving
- Calories: 197
- Sugar: 12g
- Sodium: 105mg
- Fat: 10g
- Saturated Fat: 6g
- Unsaturated Fat: 3g
- Trans Fat: 0g
- Carbohydrates: 25g
- Fiber: 1g
- Protein: 3g
- Cholesterol: 33mg
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