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Lemon Layer Cake With Lemon Curd and Mascarpone

The memory of my grandmother’s lemon tree is inextricably linked to the joy of baking. As a child, I’d spend hours beneath its fragrant canopy, the sun dappling through the leaves, as she’d tell me stories. The vibrant yellow lemons, plucked fresh from the branches, always found their way into her legendary lemon cake. This Lemon Layer Cake with Lemon Curd and Mascarpone is my attempt to recapture that sunshine-filled nostalgia, a tribute to her unwavering love and the simple magic of baking.

Recipe Overview

Prep Time: 48 hours 25 minutes
Cook Time: 15 minutes
Servings: 12

Ingredients

For the Lemon Curd:

1 cup sugar
¾ cup fresh lemon juice
3 large eggs
3 large egg yolks
¼ cup chilled unsalted butter, cut into ½ inch cubes

For the Cake:

6 large eggs, separated
14 tablespoons sugar
1 ¾ cups sifted cake flour (sifted, then measured)
½ teaspoon salt

For the Syrup:

½ cup sugar
½ cup boiling water
¼ cup fresh lemon juice

For the Filling and Frosting:

2 cups chilled heavy whipping cream
¾ cup sugar
3 (8 ounce) containers chilled mascarpone cheese

Equipment Needed

Two 9-inch-diameter cake pans with 1 ½-inch-high sides
Parchment paper
Electric mixer
Medium metal bowl
Saucepan
Small metal bowl
Pastry bag fitted with a ½-inch star tip

Instructions

This cake requires planning. Begin the preparations two days before you intend to serve it.
Making the Lemon Curd: In a medium metal bowl, whisk together the sugar, fresh lemon juice, eggs, and egg yolks.
Set the bowl over a saucepan of simmering water, ensuring the bottom of the bowl does not touch the water. Whisk constantly until the mixture thickens and an instant-read thermometer inserted into the mixture registers 160°F, which should take approximately 10 minutes.
Remove the bowl from over the water. Add the chilled butter and whisk until it is completely melted and incorporated.
Transfer 2 cups of the lemon curd to a small bowl. This portion will be used for spreading on the cake layers. Reserve the remaining curd; it will be used as part of the filling.
Press plastic wrap directly onto the surface of both bowls of curd to prevent a skin from forming. Chill both bowls of lemon curd overnight. The curd can be made up to 3 days in advance and kept chilled.
Preparing the Cake: Position a rack in the center of your oven and preheat the oven to 375°F (190°C).
Line the bottom of each of the two 9-inch-diameter cake pans with 1 ½-inch-high sides with parchment paper circles. Important: Do not grease the pans or the parchment paper.
Using an electric mixer, in a large bowl, beat the egg yolks and 7 tablespoons of sugar until the mixture becomes very thick. You should see slowly dissolving ribbons forming when the beaters are lifted, which will take about 4 minutes.
In another large, clean, and dry bowl, using clean, dry beaters, beat the egg whites until soft peaks form.
Gradually add the remaining 7 tablespoons of sugar, about 1 tablespoon at a time, beating until the whites are stiff and glossy.
Fold half of the beaten egg whites into the yolk mixture. Then, sift half of the sifted cake flour and the ½ teaspoon of salt over the mixture. Gently fold the flour into the egg mixture until it is just incorporated.
Fold in the remaining egg whites, then sift the remaining cake flour over the batter. Fold gently until just combined, taking care not to deflate the batter.
Divide the batter evenly between the two prepared cake pans. Smooth the tops of the batter.
Bake the cakes until a tester inserted into the center comes out clean. This should take about 15 minutes.
Cool the cakes in the pans on wire racks.
Once the cakes are cool enough to handle, run a knife around the edge of the pans to loosen the cakes. Invert the cakes onto 9-inch-diameter cardboard rounds, tapping on the work surface if necessary to release the cakes.
Cut each cake horizontally in half, creating thin layers. Peel off the parchment paper from each layer.
Making the Syrup: In a small metal bowl, place the sugar. Add the boiling water and stir to dissolve the sugar completely. Stir in the fresh lemon juice.
Preparing the Filling and Frosting: In a large bowl, beat the chilled heavy whipping cream and sugar until stiff peaks form.
In a medium bowl, add the chilled mascarpone cheese to the reserved lemon curd. Whisk until the mixture is well blended.
Fold the whipped cream into the lemon-mascarpone mixture.
Assembling the Cake: Place one cake layer, flat side up, on a serving platter.
Brush the cake layer with ½ of the prepared syrup.
Spread ½ cup of the lemon curd (from the portion you set aside) over the syrup-soaked cake layer. Then, spread 1 cup of the lemon-mascarpone filling over the lemon curd.
Top with the second cake layer. Brush with ½ of the remaining syrup and spread with ½ cup of lemon curd and 1 cup of lemon-mascarpone filling.
Repeat with the third cake layer, syrup, lemon curd, and filling.
Top with the fourth cake layer.
Brush the top layer with the remaining syrup, then spread the remaining lemon curd over the top.
Spoon 2 cups of the lemon-mascarpone filling into a pastry bag fitted with a ½-inch star tip. This will be used for creating the decorative rosettes.
Spread the remaining lemon-mascarpone filling as a frosting over the sides of the cake.
Pipe small rosettes of frosting over the top of the cake, completely covering the surface.
Cover the cake with a cake dome and refrigerate for at least 6 hours, or up to 1 day, to allow the flavors to meld and the cake to set.

Expert Tips & Tricks

Perfectly Sifted Flour: Sifting the flour is crucial for a light and airy cake. Sift after measuring to ensure you have the correct amount.
Tempering the Eggs: When making the lemon curd, be patient and whisk constantly over low heat. This prevents the eggs from scrambling and ensures a smooth, creamy texture.
Cold Ingredients Matter: Make sure the butter for the lemon curd and the mascarpone cheese are properly chilled. This helps with thickening and stability.
Piping Perfection: Practicing piping your rosettes on a plate before decorating the cake can improve your technique.
Cake Layer Stability: For easier handling, chill the cut cake layers briefly before assembly. They’ll be less likely to tear.

Serving & Storage Suggestions

Serve the Lemon Layer Cake chilled for the best flavor and texture. A slice pairs beautifully with a cup of Earl Grey tea or a glass of chilled Moscato.

Store leftover cake in the refrigerator, covered, for up to 3 days. The cake is best consumed within this timeframe to maintain its freshness and avoid the frosting becoming soggy. Freezing is not recommended as it can alter the texture of the mascarpone and lemon curd.

Nutritional Information

Nutrient	Amount per Serving	% Daily Value
Calories	519 kcal	N/A
Total Fat	23.5 g	36%
Saturated Fat	13.2 g	65%
Cholesterol	275.6 mg	91%
Sodium	167.8 mg	6%
Total Carbohydrate	71.1 g	23%
Dietary Fiber	0.4 g	1%
Sugars	53.1 g	N/A
Protein	8 g	15%

Note: Daily values are based on a 2,000 calorie diet. Actual values may vary.

Variations & Substitutions

Gluten-Free: Substitute the cake flour with a gluten-free blend designed for baking, ensuring it contains xanthan gum for binding.
Vegan Option: While challenging, the curd and mascarpone pose the biggest hurdles. A vegan lemon curd can be made using agar-agar for thickening, and some brands of vegan mascarpone alternatives are available. For the cake, use a flax egg replacement.
Seasonal Twist: Add a layer of fresh berries (strawberries, raspberries, or blueberries) between the lemon curd and mascarpone filling for a summery variation.
Citrus Zest: Enhance the lemon flavor by adding the zest of one lemon to the cake batter.

FAQs (Frequently Asked Questions)

Q: Can I make the cake layers ahead of time?
A: Absolutely! The cake layers can be baked, cooled, and wrapped tightly in plastic wrap. Store them at room temperature for up to 2 days or freeze for up to a month. Thaw completely before assembling.

Q: What can I use if I can’t find mascarpone cheese?
A: While mascarpone provides a unique richness, you can substitute it with cream cheese. Ensure it’s full-fat cream cheese for a similar texture and flavor.

Q: My lemon curd is too runny. What did I do wrong?
A: Your lemon curd likely wasn’t cooked to a high enough temperature or long enough. If it’s only slightly runny, you can try chilling it for a longer period. If it’s very thin, you may need to re-cook it gently over low heat.

Q: How do I prevent the cake layers from sticking to the pan?
A: Lining the bottom of the cake pans with parchment paper is crucial. Do not grease the pans, as the cake needs to grip the sides to rise properly.

Q: Can I use bottled lemon juice instead of fresh?
A: Fresh lemon juice provides the best flavor, but bottled lemon juice can be used in a pinch. Be sure to use a high-quality brand. The taste might be slightly different.

Final Thoughts

This Lemon Layer Cake with Lemon Curd and Mascarpone is a labor of love, but the exquisite combination of tangy lemon and creamy mascarpone is well worth the effort. Don’t be intimidated by the multi-step process – break it down into manageable tasks, and enjoy the journey of creating something truly special. I encourage you to give this recipe a try and let me know how it turns out! Perhaps serve it with a sparkling glass of Prosecco for a truly celebratory occasion.

Lemon Layer Cake With Lemon Curd and Mascarpone Recipe