Lemon Crumb Bars

Why You’ll Love This Recipe

These Lemon Oatmeal Bars are a fun and flavorful twist on traditional lemon bars. The oat crumble base adds texture and richness, while the sweetened condensed milk and lemon filling provide a smooth, tangy contrast. The combination of flavors is simply irresistible. Plus, with an optional white chocolate dip, these bars become even more indulgent. Perfect for any lemon lover, they’re a treat that will be sure to impress!

Ingredients

→ For the Crust and Crumble Topping

• 1 ¼ cups all-purpose flour
• 1 ¼ cups old-fashioned rolled oats
• ½ teaspoon salt
• ½ teaspoon baking soda
• ½ cup granulated sugar
• ½ cup packed light brown sugar
• ¾ cup unsalted butter, melted
• 1 teaspoon vanilla extract

→ For the Lemon Filling

• 1 (14 oz) can sweetened condensed milk
• 2 tablespoons finely grated lemon zest
• ½ cup fresh lemon juice
• 2 large egg yolks

→ Optional for Extra Treat

• ½ cup white chocolate, melted (for dipping)

(Tip: You’ll find the full list of ingredients and measurements in the recipe card below.)

Directions

1. Preheat the Oven: Preheat the oven to 350°F (175°C) and grease an 8×8-inch baking pan with baking spray or line it with parchment paper.
2. Make the Crust and Crumble Mixture: In a large bowl, combine the all-purpose flour, rolled oats, salt, and baking soda. Stir in both the granulated sugar and brown sugar. Add the melted butter and vanilla extract, then mix until well combined.
3. Press the Crust into the Pan: Press half of the oat mixture firmly into the bottom of the prepared pan to form the crust. Bake for 15 minutes, or until lightly golden.
4. Prepare the Lemon Filling: While the crust is baking, whisk together the sweetened condensed milk, lemon zest, lemon juice, and egg yolks in a separate bowl until smooth and well combined.
5. Add the Lemon Filling: Once the crust is baked, pour the lemon filling evenly over the crust.
6. Add the Crumble Topping: Sprinkle the remaining oat crumble mixture evenly over the lemon filling.
7. Bake the Bars: Bake the bars for an additional 20–22 minutes, until the top is lightly golden and the filling is set. The center should be firm when gently tapped.
8. Cool and Refrigerate: Allow the bars to cool completely at room temperature. Once cool, refrigerate for at least 2 hours to allow them to firm up before slicing.
9. Optional White Chocolate Dipping: For an extra treat, dip the bottom half of each chilled bar in melted white chocolate. Place them on a wax paper-lined baking sheet and refrigerate until the chocolate sets.
10. Serve: Once chilled and set, slice the bars into squares and serve. Enjoy!

Servings and Timing

• Servings: 9-12 bars
• Preparation Time: 15 minutes
• Baking Time: 35-37 minutes
• Cooling and Refrigerating Time: 2 hours
• Total Time: 3 hours (including cooling time)

Variations

• Gluten-Free Option: Substitute the all-purpose flour with a gluten-free flour blend and ensure that the oats are certified gluten-free for a gluten-free version.
• Vegan Version: Use a dairy-free sweetened condensed milk and substitute the egg yolks with a flax egg (1 tablespoon ground flaxseed mixed with 3 tablespoons water) for a vegan-friendly alternative.
• Berry Addition: Add fresh raspberries or blueberries to the lemon filling for a fruity twist.
• Chocolate Chips: For extra sweetness, sprinkle chocolate chips on top of the crumble mixture before baking.

Storage/Reheating

• Storage: Store leftover bars in an airtight container in the refrigerator for up to 4-5 days.
• Reheating: These bars are best served chilled. If you prefer, you can let them come to room temperature before serving.

FAQs

Can I use bottled lemon juice instead of fresh?

Fresh lemon juice is recommended for the best flavor, but bottled lemon juice can be used in a pinch. However, fresh lemon zest is still preferred for the best aroma and taste.

Can I double the recipe?

Yes, you can double the ingredients and bake the bars in a 9×13-inch baking pan. Just increase the baking time by 5-10 minutes, keeping an eye on the bars as they bake.

Can I freeze these bars?

Yes, you can freeze the bars. After they’ve cooled and set, wrap them tightly in plastic wrap or foil, and store them in a freezer-safe bag for up to 2 months. Thaw in the refrigerator before serving.

What can I use instead of egg yolks?

If you don’t have egg yolks, you can use an egg replacer or substitute 1/4 cup of unsweetened applesauce or mashed bananas per egg yolk for a vegan-friendly option.

Can I use a different fruit zest?

Yes, you can substitute lemon zest with lime zest, orange zest, or even grapefruit zest for a different citrus flavor.

How do I know when the bars are done?

The bars should be golden around the edges, and the lemon filling should be set and firm to the touch. You can also gently shake the pan to check that the filling doesn’t jiggle too much.

Can I add a crumb topping instead of a full crumble layer?

Yes, if you prefer, you can use just a light crumb topping instead of a full crumble layer. Just sprinkle a small amount of the oat mixture over the filling before baking.

Conclusion

Lemon Oatmeal Bars are the perfect combination of sweet, tangy, and buttery, with a rich lemon filling topped with a crunchy oat crumble. They’re a refreshing treat for any occasion, whether you’re serving them at a gathering or enjoying them as a snack. With the option of a white chocolate dip, these bars are sure to become a family favorite!

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