Lemon Crumb Bars Recipe

Cook Time: 45 minutes

Yield: 16 servings

Ingredients

Crust and Crumb Topping

• 3/4 cup unsalted butter, melted
• 1/2 cup white sugar
• 1/2 cup firmly packed light brown sugar
• 3/4 teaspoon salt
• 2 teaspoons vanilla extract
• 2 cups all-purpose flour
• 1/4 teaspoon baking powder

Filling

• 3 large eggs, at room temperature, divided
• 1 cup plus 2 tablespoons white sugar
• 2 tablespoons cornstarch
• 2 tablespoons freshly grated lemon zest
• 1 pinch salt
• 3 tablespoons unsalted butter, melted and cooled
• 1/2 cup freshly squeezed lemon juice

Directions

1. Preheat the oven to 350F (180C). Line a 9x9-inch square pan with parchment paper, ensuring theres an overhang on all sides.
2. For the crust and crumb topping, stir together melted butter, white sugar, brown sugar, salt, and vanilla extract until well combined. Add flour and baking powder, mixing until the mixture forms large clumps.
3. Measure out 1 3/4 cups of the crumb mixture, loosely packed, and press it firmly and evenly into the bottom of the prepared pan. Reserve the remaining crumb mixture for the topping.
4. Break an egg into a large bowl and whisk briefly. Lightly brush a thin layer of this egg over the crust, using any remaining egg in the filling.
5. Place the crust in the freezer for 10 to 15 minutes while you prepare the filling.
6. For the filling, to the egg you used for the wash, add the remaining 2 eggs, 1 cup plus 2 tablespoons sugar, cornstarch, lemon zest, and a pinch of salt. Whisk until completely smooth and combined.
7. Whisk in the melted butter until fully incorporated. Add the lemon juice and whisk to combine.
8. Remove the crust from the freezer and pour the filling evenly over the top.
9. Bake in the preheated oven for 25 minutes. Remove the pan from the oven and sprinkle the reserved crumb topping evenly over the bars, breaking up any larger crumbs if necessary.
10. Return the pan to the oven and bake for an additional 20 to 25 minutes, until the crumbs just begin to turn golden.
11. Allow the bars to cool completely, about 30 minutes, before cutting into squares and serving.

Cooks Note

I recommend using a metal pan instead of a glass one to avoid potential thermal shock when moving the pan from the freezer to the oven.

Nutrition Facts (per serving)

Calories	273
Total Fat	12g
Saturated Fat	7g
Cholesterol	63mg
Sodium	134mg
Total Carbohydrate	40g
Dietary Fiber	1g
Total Sugars	26g
Protein	3g
Vitamin C	2mg
Calcium	22mg
Iron	1mg
Potassium	51mg

Percent Daily Values are based on a 2,000 calorie diet. Your daily values may be higher or lower depending on your calorie needs. Nutritional information is based on available data and may not be available for all ingredients.

Origin Story

Lemon Crumb Bars are a delightful American dessert that combines the zing of fresh lemons with the comfort of a buttery crumb crust. While there isn't a single definitive story behind their creation, it is widely believed that this treat originated as part of a larger category of lemon bars that became popular in the United States during the mid-20th century. The basic structure of the recipea buttery base topped with a tangy lemon fillinghas been a classic since the 1960s. Over the years, bakers have experimented with different textures, often adding crumb toppings to create a new twist on the beloved lemon bar.

Regional Variations

Though Lemon Crumb Bars are loved across the United States, regional variations exist. In coastal areas where lemons are abundant, such as California and Florida, lemon desserts like these bars are especially popular. In these regions, local lemon varieties, like the Meyer lemon, are sometimes used to impart a sweeter, less tangy flavor to the bars. Additionally, in areas with Mediterranean influences, such as parts of the Southwest, you might find these bars paired with herbs like basil or thyme, which complement the citrusy flavor.

What Sets Them Apart?

Lemon Crumb Bars are often compared to traditional lemon bars, but they stand out due to their crumbly topping, which adds texture and a richer flavor. Unlike regular lemon bars, which typically have a smooth, custard-like filling, the crumb topping provides a contrast that makes each bite more interesting. The buttery shortbread-like crust, combined with a golden crumb topping, makes them more indulgent than their smoother counterparts. The added crunch and texture differentiate these bars from other lemon-based desserts like lemon squares or lemon tarts.

Where Are They Usually Served?

Lemon Crumb Bars are a popular dessert choice for casual gatherings, potlucks, and holiday parties. Their easy-to-serve bar form makes them ideal for sharing, whether at a family dinner, a picnic, or a bake sale. Additionally, they're a great treat for brunches or tea parties, where guests can enjoy the light, citrusy flavor with their afternoon drinks. In some regions, these bars are even served at local bakeries and cafes, often alongside other fruity desserts like berry cobblers or pies.

Interesting Facts

• The origin of the traditional lemon bar recipe is often attributed to the 1960s, with some claiming it was popularized by First Lady Betty Ford, who was known for her love of simple, homey desserts.
• Lemon Crumb Bars can easily be customized by adding other citrus fruits like lime or orange. Some even add berries like blueberries or raspberries to the lemon filling, creating a fusion of flavors.
• Despite their simple appearance, Lemon Crumb Bars are often considered a "premium" dessert, as their texture and balance of flavors make them a sophisticated choice at any event.

In conclusion, Lemon Crumb Bars are more than just a treattheyre a nostalgic dessert with a rich history and regional variations that reflect America's diverse culinary influences. Whether you enjoy them as part of a holiday meal or a casual snack, they bring a zesty sweetness to any occasion.

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