Blackberry Lemon Bars with Shortbread (Print Version)

Buttery shortbread base, tangy lemon filling and a bright blackberry swirl for a balanced sweet-tart bar.

# What You'll Need:

→ Shortbread crust

01 - 1 cup (2 sticks) unsalted butter, softened
02 - 1/2 cup granulated sugar
03 - 2 cups all-purpose flour
04 - 1/2 teaspoon fine salt

→ Blackberry swirl

05 - 1 cup fresh or frozen blackberries
06 - 2 tablespoons granulated sugar
07 - 1 teaspoon fresh lemon juice

→ Lemon filling

08 - 1 1/2 cups granulated sugar
09 - 1/4 cup all-purpose flour
10 - 4 large eggs
11 - 2/3 cup freshly squeezed lemon juice (about 3–4 lemons)
12 - Zest of 2 lemons

# Directions:

01 - Preheat oven to 350°F. Line a 9x9-inch baking pan with parchment paper, leaving a 1-inch overhang for easy removal; set the pan aside.
02 - In a medium bowl, beat the softened butter and granulated sugar until light and fluffy. Add the flour and salt and mix just until the dough comes together, avoiding overworking.
03 - Press the dough evenly into the prepared pan using your fingers or an offset spatula to form a compact layer. Bake at 350°F for 18–20 minutes, or until the edges are set and the surface is a pale golden; remove from oven and set aside while preparing the fillings.
04 - Combine blackberries, sugar and lemon juice in a small saucepan over medium heat. Cook, mashing the berries with the back of a spoon, until the mixture thickens, about 4–6 minutes. Press through a fine-mesh sieve to remove seeds and reserve the smooth puree; allow to cool slightly.
05 - In a large bowl, whisk together the granulated sugar and flour. Add the eggs, lemon juice and lemon zest and whisk until fully combined and smooth.
06 - Pour the lemon filling evenly over the warm pre-baked crust. Drop small spoonfuls of the blackberry puree across the filling and use a skewer or knife to gently swirl the puree into a marbled pattern.
07 - Return the pan to the oven and bake at 350°F for 20–22 minutes, until the center is just set and the surface appears slightly matte. Remove from the oven and cool on a wire rack.
08 - Cool completely in the pan, then refrigerate for at least 2 hours to firm. Use the parchment overhang to lift the slab from the pan and slice into 16 bars. Dust with powdered sugar if desired and store refrigerated in an airtight container for up to 4 days.

# Expert Tips:

01 -
  • The blackberry swirl looks impressive but takes only minutes, and friends always think you’re hiding a secret technique.
  • These bars strike a perfectly satisfying balance between melt-in-your-mouth crust, tart lemon, and deep berry flavor—that’s why they never last long on the dessert tray.
02 -
  • Once, I rushed slicing before chilling and ended up with a delicious mess—always give these bars extra time to set.
  • A fine-mesh sieve for the blackberry puree is non-negotiable for that smooth, seedless swirl—I learned this after biting into a rogue seed and wincing.
03 -
  • Always zest your lemons before juicing—if you forget, it’s nearly impossible to do it later without squishing the fruit.
  • A sharp knife dipped in hot water slices cleanly through the chilled bars, leaving tidy, bakery-worthy edges.
Go Back