These Lemon Bars with Shortbread Crust combine a rich, buttery vanilla shortbread base with a tangy lemon filling for a classic, refreshing dessert. The crust bakes to a tender, slightly crumbly layer that holds a smooth, bright lemon custard-like filling. After cooling and chilling, the bars are finished with a light dusting of powdered sugar for the perfect balance of sweet and tart.
Ingredients Needed & Why
- All-Purpose Flour – Provides structure to the crust and keeps the shortbread tender.
- Granulated Sugar – Sweetens both crust and filling without masking the lemon flavor.
- Ground Ginger – Optional, adds a warm, subtle flavor that complements lemon and vanilla.
- Vanilla Extract – Rounds out the shortbread with floral, creamy notes.
- Unsalted Butter – Softened and worked into the dough to create a rich, melt-in-your-mouth crust.
- Fresh Lemon Juice and Lemon Zest – Fresh juice and zest (about 4 large lemons) give the filling bright, natural citrus flavor.
How to Make Lemon Bars
This recipe is approachable for bakers of all levels. No special equipment is required — just basic mixing bowls, a whisk, and a 9 x 13 inch pan. The method is straightforward: prepare and press a shortbread crust into the pan and partially bake it, then whisk together the lemon filling while the crust pre-bakes. Pour the filling over the hot crust and return the pan to the oven until the filling is set. Chilling after baking helps the bars firm up and makes clean slicing much easier.
- Wet your fingertips with cold water when pressing the shortbread into the pan; this prevents the dough from sticking and keeps the butter from softening too quickly.
- If you prefer no ginger, simply omit it. If you like a hint of spice, you can increase it slightly to taste.
- Some air bubbles on the surface after baking are normal. They won’t affect flavor and will be hidden beneath powdered sugar.
After baking, allow the pan to cool to room temperature, then refrigerate for at least 1.5–2 hours so the filling sets completely. Chilled bars slice more cleanly and hold their shape when served. Finish with a light dusting of powdered sugar for the classic lemon bar look.
The most challenging part is waiting for them to chill — the aroma of fresh lemon while they bake makes the wait worthwhile. Once ready, the combination of buttery shortbread and bright lemon filling creates a wonderfully balanced dessert that’s perfect for potlucks, afternoons with tea, or a simple, elegant finish to any meal.
Helpful Tips
- Use a glass or ceramic pan for steady, even baking and cleaner slicing; glass lets you see the crust and filling while they bake.
- Bring eggs to room temperature so they mix smoothly into the filling and avoid lumps.
- Pour the filling over a hot crust right out of the oven; this helps the layers set together and prevents a soggy base.
- Chill completely before slicing to achieve neat, sharp squares with clean edges.
- Zest before juicing to capture the fragrant oils and avoid bruising the fruit.
Do Lemon Bars Have to be Refrigerated?
Because the lemon filling is essentially a curd-like custard, lemon bars are best stored in the refrigerator when not being served. If you’re presenting them at a party, they can sit at room temperature for a few hours, but refrigeration will keep the texture and flavor at their best and extends freshness.
How to Perfectly Slice Lemon Bars
Line a 9 x 13 inch pan with parchment paper, leaving about a 3-inch overhang on the long sides so you can lift the whole slab out. After chilling for a couple of hours, you can briefly place the pan in the freezer for 30–60 minutes to firm the bars slightly — they will cut more cleanly when firmer. Run a sharp knife or an offset spatula around the edges before lifting the slab from the pan.
Slice on a stable cutting board, wiping the knife clean between cuts for tidy edges. If a sharp knife is slipping, warm the blade under hot water, dry it, then slice again — this can help for smoother cuts through the filling.
Storage & Leftovers
- Serving: Best chilled or at room temperature — not warm.
- Refrigerator: Store in an airtight container for up to 5 days.
- Freezer: Freeze individual bars (skip the powdered sugar) for up to 2 months. Thaw in the fridge and dust with powdered sugar before serving.
Recipe Summary
Lemon Bars with Shortbread Crust
Cook: 45 mins |
Total: 55 mins |
Yield: 12 servings
Ingredients
Vanilla Shortbread Crust
- 2 cups (250 g) all-purpose flour
- 1/2 cup (100 g) granulated sugar
- 1/2 tsp kosher salt
- 1 tsp ground ginger (optional)
- 1 1/2 tsp vanilla extract
- 16 Tbsp (226 g) unsalted butter, softened
Lemon Bar Filling
- 3/4 cup fresh lemon juice (from about 4 large lemons)
- 4 large eggs
- 1 egg yolk
- 1 3/4 cups granulated sugar
- 2 Tbsp fresh lemon zest
- 1/4 cup plus 3 Tbsp all-purpose flour
Topping
- Powdered sugar, for dusting
Instructions
- Preheat the oven to 325°F (163°C). Line a 9 x 13 inch glass baking pan with parchment paper, leaving about 3 inches of overhang on the long sides.
- In a medium bowl, whisk together the flour, granulated sugar, salt, and ground ginger (if using).
- Add the vanilla extract and softened butter to the dry ingredients. Work the mixture with your hands until a soft shortbread dough forms.
- Transfer the dough to the prepared pan and press it evenly across the bottom. Use wet, cold fingertips or a rubber spatula to prevent sticking and to smooth the surface.
- Bake the crust on the middle rack for 18–20 minutes, or until it is just beginning to turn golden at the edges.
- While the crust bakes, whisk together the lemon filling: combine the lemon juice, eggs, egg yolk, granulated sugar, lemon zest, and the additional flour until completely smooth.
- Remove the pre-baked crust from the oven and pour the filling over the hot crust in an even layer.
- Return the pan to the oven and bake for 22–24 minutes, or until the center is set and does not jiggle when gently shaken.
- Remove the pan from the oven and let it cool on a wire rack until it reaches room temperature.
- Cover the cooled pan and refrigerate for 1.5–2 hours to fully set and chill the bars.
- Run an offset spatula around the pan edges to loosen the bars. Lift the slab out using the parchment overhang and place it on a cutting surface.
- Use a sharp knife to slice into squares, wiping the blade between cuts for clean edges. Dust the tops lightly with powdered sugar and serve.
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