Iced Lemon Shortbread Bars: A Burst of Sunshine in Every Bite

The memory of my grandmother’s kitchen still brings a smile to my face. Every summer, the air would be thick with the scent of lemons, as she whipped up a batch of her famous lemon shortbread bars. The sweet-tart aroma would drift out the windows, beckoning us kids in from the garden. These bars were pure sunshine on a plate – a treat that always felt like a special occasion, even when it was just an ordinary summer afternoon. This recipe is an ode to her, a chance to relive those golden memories and share a little bit of sunshine with you.

Recipe Overview

• Prep Time: 15 minutes
• Cook Time: 35-45 minutes
• Total Time: 50-60 minutes
• Servings: 24-36 bars
• Yield: 1 (13×9 inch) pan
• Dietary Type: Vegetarian

Ingredients

For the Shortbread Crust:

• ¾ cup powdered sugar
• ¼ cup sugar
• 1 cup (2 sticks) butter, softened
• 2 tablespoons grated lemon peel (zest)
• ¼ cup lemon juice
• 2 ¼ cups all-purpose flour
• ½ cup cornstarch
• ¼ teaspoon salt

For the Lemon Icing:

• 2 teaspoons light corn syrup
• 3-4 tablespoons lemon juice
• 1 teaspoon grated lemon zest
• 2 cups powdered sugar

Equipment Needed

• 13×9 inch baking pan
• Mixing bowls
• Electric mixer
• Measuring cups and spoons
• Wire rack

Instructions

1. Preheat your oven to 325°F (160°C). While the oven is heating, grease the bottom and sides of your 13×9 inch baking pan with Crisco or another solid vegetable shortening. Make sure you get into all the corners. Set the prepared pan aside. This will help the bars release cleanly later.
2. In a large mixing bowl, cream together the ¾ cup of powdered sugar, the ¼ cup of granulated sugar, and the 1 cup (2 sticks) of softened butter until well combined. It’s important that your butter is properly softened, not melted, to ensure a tender crust.
3. Using an electric mixer, beat the sugar and butter mixture on medium speed until it becomes light and fluffy. This should take a couple of minutes. The air incorporated during this step will contribute to the shortbread’s delicate texture.
4. Stir in the 2 tablespoons of grated lemon peel (zest) and the ¼ cup of lemon juice. Make sure the lemon zest is finely grated to release its aromatic oils.
5. In a separate bowl, whisk together the 2 ¼ cups of flour, the ½ cup of cornstarch, and the ¼ teaspoon of salt. This ensures even distribution of the dry ingredients.
6. Gradually add the dry ingredients to the wet ingredients, mixing until just combined. Be careful not to overmix, as this can develop the gluten in the flour and result in a tough crust.
7. Press the dough evenly into the prepared 13×9 inch pan. For best results, use floured fingers or the bottom of a measuring cup to press the dough firmly and evenly into the pan. This creates a uniform crust that will bake evenly.
8. Bake in the preheated oven for 35-45 minutes, or until the top is lightly golden brown. Keep a close eye on the shortbread during the last few minutes of baking, as ovens can vary. The edges should be set, and the center should be slightly firm to the touch.
9. Remove the pan from the oven and let the shortbread cool completely in the pan on a wire rack for about 45 minutes. It’s crucial to let the shortbread cool completely before adding the icing, otherwise the icing will melt and become runny.
10. Prepare the lemon icing while the shortbread is cooling. In a medium bowl, combine the 2 teaspoons of light corn syrup, 3-4 tablespoons of lemon juice, 1 teaspoon of grated lemon zest, and the 2 cups of powdered sugar.
11. Mix all icing ingredients in a medium bowl with a spoon until smooth and spreadable. Add more lemon juice, a teaspoon at a time, until you reach your desired consistency.
12. Once the shortbread is completely cool, spread the lemon icing evenly over the top.
13. Let the icing stand for about 15 minutes, or until set. This allows the icing to firm up and creates a nice, glossy finish.
14. For bars, cut the shortbread into 6×6 rows, creating approximately 36 bars. Use a sharp knife for clean cuts.

Expert Tips & Tricks

• For extra-tender shortbread, use cake flour instead of all-purpose flour. Cake flour has a lower protein content, resulting in a more delicate crumb.
• Don’t skip the cornstarch! Cornstarch helps create a tender, melt-in-your-mouth texture.
• If your dough is too sticky to press into the pan, chill it in the refrigerator for 15-20 minutes before pressing.
• To prevent the edges from browning too quickly, tent the pan with foil during the last 10 minutes of baking.
• For a more intense lemon flavor, add a few drops of lemon extract to the icing.
• If your icing is too thick, add a little more lemon juice. If it’s too thin, add a little more powdered sugar.
• To make ahead, bake the shortbread crust and store it, tightly wrapped, at room temperature for up to 2 days. Prepare the icing just before serving.

Serving & Storage Suggestions

These iced lemon shortbread bars are best served chilled or at room temperature. They are perfect for afternoon tea, dessert, or a light snack. To elevate the presentation, dust the bars with extra powdered sugar or garnish with fresh lemon slices.

Store leftover bars in an airtight container at room temperature for up to 3 days, or in the refrigerator for up to 5 days. For longer storage, freeze the bars in a single layer on a baking sheet, then transfer them to a freezer-safe container. Frozen bars will last for up to 2 months. Let them thaw at room temperature before serving.

Nutritional Information

Nutrient	Amount per Serving	% Daily Value
Calories	185.3 kcal	N/A
Calories from Fat	70 g	38%
Total Fat	7.8 g	12%
Saturated Fat	4.9 g	24%
Cholesterol	20.3 mg	6%
Sodium	79.8 mg	3%
Total Carbohydrate	28.1 g	9%
Dietary Fiber	0.4 g	1%
Sugars	15.9 g	63%
Protein	1.3 g	2%

Variations & Substitutions

• Gluten-Free: Use a gluten-free all-purpose flour blend to make these bars gluten-free. Be sure to check that your cornstarch is also certified gluten-free.
• Lime Bars: Substitute lime juice and lime zest for the lemon juice and lemon zest.
• Orange Bars: Substitute orange juice and orange zest for the lemon juice and lemon zest.
• Vegan: Replace the butter with a vegan butter substitute. Ensure the sugar used is vegan as some brands use bone char during processing.
• Chocolate Drizzle: Drizzle melted dark chocolate over the iced bars for a decadent twist.

FAQs (Frequently Asked Questions)

Q: Can I use salted butter instead of unsalted?
A: Yes, you can use salted butter, but reduce the amount of salt in the recipe to 1/8 teaspoon to compensate.

Q: Why did my shortbread turn out hard?
A: Overmixing the dough can develop the gluten in the flour, resulting in a tough crust. Be careful not to overmix.

Q: Can I make this recipe in a different size pan?
A: You can, but you may need to adjust the baking time. A smaller pan will require a longer baking time, while a larger pan will require a shorter baking time.

Q: How do I prevent the shortbread from sticking to the pan?
A: Make sure to grease the bottom and sides of the pan thoroughly with Crisco or another solid vegetable shortening. You can also line the pan with parchment paper, leaving an overhang for easy removal.

Q: Can I freeze the finished bars?
A: Yes, you can freeze the finished bars. Freeze them in a single layer on a baking sheet, then transfer them to a freezer-safe container. They will last for up to 2 months. Let them thaw at room temperature before serving.

Final Thoughts

I hope this recipe brings as much joy to your kitchen as it does to mine. These Iced Lemon Shortbread Bars are a simple yet elegant treat that’s perfect for any occasion. Don’t be afraid to experiment with different flavors and variations to make them your own. And most importantly, enjoy the process of baking and sharing these little bursts of sunshine with the people you love.