Ingredients
Scale
Shortbread Crust
- 2 cups (240 g) all-purpose flour
- 1/2 cup (60 g) powdered sugar
- 1 cup (226 g) unsalted butter, softened
- 2 tablespoons cornstarch
- 1/4 teaspoon fine salt
- 1 teaspoon vanilla extract
Lemon Coconut Cream Filling
- 1 can (14 oz / 396 g) sweetened condensed milk
- 4 large egg yolks
- 1/2 cup (120 ml) freshly squeezed lemon juice
- 1 tablespoon finely grated lemon zest
- 1 teaspoon vanilla extract
- 1 cup sweetened shredded coconut
- 1/2 cup (120 g) full-fat sour cream
Whipped Cream Topping
- 1 1/2 cups (360 ml) cold heavy whipping cream
- 1/3 cup (40 g) powdered sugar
- 1 teaspoon vanilla extract
Decoration
- 1/2 cup toasted coconut
- Fresh lemon zest, optional
- Thin lemon slices, optional
- White chocolate curls, optional
- Fresh mint leaves, optional
Instructions
- Prepare the pan. Preheat the oven to 350°F (175°C). Place a rack in the center of the oven. Line a 9×13-inch baking pan with parchment paper, leaving enough overhang on two sides to lift out the chilled bars later.
- Mix the crust. Beat the softened butter, powdered sugar, and vanilla for 1–2 minutes, until smooth and creamy.
- In a separate bowl, whisk together the flour, cornstarch, and salt.
- Add the dry ingredients to the butter mixture. Mix on low speed just until a soft, slightly crumbly dough forms. Do not overmix.
- Form the crust. Scatter the dough evenly across the prepared pan. Press it into an even layer with your fingers or the flat bottom of a measuring cup. Press firmly enough for the dough to hold together, but do not heavily compact it.
- Prebake. Bake for 18–22 minutes, or until the surface looks dry and the edges are lightly golden.
- Prepare the filling. While the crust bakes, whisk the egg yolks in a medium bowl until smooth. Add the sweetened condensed milk, fresh lemon juice, lemon zest, vanilla, and sour cream. Whisk gently until smooth.
- Fold in the sweetened shredded coconut. Avoid vigorous mixing, which can introduce unnecessary air bubbles.
- Remove the crust from the oven and allow it to rest for 3–5 minutes.
- Pour the lemon-coconut filling evenly over the warm crust.
- Bake again. Return the pan to the oven and bake for 15–18 minutes, until the outer area is set and the center is no longer liquid. A slight movement in the center is fine.
- Cool. Place the pan on a cooling rack and allow it to cool completely at room temperature.
- Cover and refrigerate for at least 4 hours, preferably overnight. The filling needs to be thoroughly cold before topping and slicing.
- Make the whipped cream. Add the cold heavy whipping cream to a clean bowl. Beat at medium speed until it begins to thicken.
- Add the powdered sugar and vanilla. Continue beating just until stiff peaks form. Do not overwhip.
- Spread a thick, even layer of whipped cream over the chilled lemon filling.
- Sprinkle the completely cooled toasted coconut generously over the whipped cream.
- Add lemon zest, white chocolate curls, thin lemon slices, or mint if desired.
- Use the parchment overhang to carefully lift the dessert from the pan.
- Cut into 16 squares. For neat layers, use a sharp knife warmed with hot water and wiped completely dry. Clean and dry the knife between cuts.
- Serve chilled.
Notes
- Use fresh lemons. Fresh juice and zest give the filling a brighter citrus flavor.
- Zest the lemons before squeezing them.
- Avoid the bitter white pith when zesting.
- Use softened butter, not melted butter, for the shortbread.
- The added cornstarch helps create a tender but stable shortbread base.
- Do not skip prebaking the crust.
- Do not pour the filling onto a raw crust.
- The filling should be set before it leaves the oven. It should not look liquid in the center.
- Do not add whipped cream until the lemon layer is completely cold.
- Toasted coconut must also be completely cool before it touches the whipped cream.
- Chill for at least 4 hours before slicing. Overnight chilling gives particularly neat layers.
- Keep leftovers covered in the refrigerator.
- The optional lemon slices are best added shortly before serving because they can release moisture.
- White chocolate curls are decorative and can be omitted without changing the recipe.
- Prep Time: 25 minutes
- Cook Time: 4 hours
- Category: Dessert
- Method: Baking
- Cuisine: American-inspired
