Triple Layer Curd Cake
- 1/4 cup 60ml fresh lemon juice (about 1-2 lemons)
- 2 tsp finely grated lemon zest
- 1/3 cup 69g sugar
- 4 egg yolks
- 3 tbsp 42g salted butter
LEMON CAKE LAYERS
- 3/4 cup 168g unsalted butter, room temperature
- 1 1/2 cups 310g granulated sugar
- 3/4 cup 173g sour cream
- 1 tsp vanilla extract
- 1 1/2 tbsp finely grated lemon zest
- 6 egg whites
- 2 1/2 cups 325g all purpose flour
- 4 tsp baking powder
- 1/2 tsp salt
- 1/2 cup 120ml milk
- 2 tbsp 30ml water
- 6 tbsp 90ml fresh lemon juice
WHIPPED MASCARPONE FROSTING
- 2 1/2 cups 720ml heavy whipping cream, cold
- 1 1/2 cups 173g powdered sugar
- 2 tsp vanilla extract
- 16 oz 452g mascarpone cheese, chilled*
TO MAKE THE LEMON CURD:
- Combine all the ingredients in a double boiler (or in a metal bowl over a pot of simmering water). Heat while whisking constantly until mixture thickens and reaches 160 degrees, or coats the back of a spoon.
- Pour the lemon curd into a heat proof bowl, cover with clear wrap pressed onto the the top of the curd to avoid a film developing, and refrigerate until cold.
TO MAKE THE CAKE LAYERS:
- Preheat oven to 350°F (176°C) and line three 8 inch cake pans with parchment paper and grease the sides.
- Cream the butter and sugar together until light and fluffy, 3-4 minutes. Add the sour cream, vanilla extract and lemon zest and mix until combined.
- Add the egg whites in two batches, mixing until well combined after each. Scrape down the sides of the bowl as needed to make sure all is incorporated and smooth.
- In a separate bowl, combine the dry ingredients. In another small bowl or measuring cup, combine the milk, water and lemon juice.
- Add half of the dry ingredients to the batter and mix until well combined. Add the milk mixture and mix until well combined. Add the remaining dry ingredients and mix until well combined. Scrape down the sides of the bowl as needed to be sure all ingredients are well incorporated.
- Divide the batter evenly between the three 8 inch pans and bake for 23-25 minutes, or until a toothpick inserted comes out with a few crumbs.
- 10. Remove the cakes from the oven and allow to cool for about 2-3 minutes, then remove to cooling racks to cool completely.
TO MAKE THE FROSTING:
- 11. Add the heavy whipping cream, powdered sugar and vanilla extract to a large mixer bowl and whip on high speed until soft peaks form.
- 12. Add the mascarpone cheese to the whipped cream and whip until stiff peaks form. It will happen fairly quickly. Set whipped frosting in the refrigerator.
- 13. To assemble the cake, use a large serrated knife to remove the domes from the top of the cakes.
- 14. Place the first layer of cake on a serving plate or a cardboard cake round. Pipe a dam of frosting around the outside of the cake.
- 15. Spread half of the lemon curd evenly on top of the cake layer, inside the dam. It should fill the dam about half way full.
- 16. Add some mascarpone frosting to the top of the lemon filling and spread into an even layer to fill in the remaining dam space.
- 17. Add the second layer of cake and repeat the filling layer with the remaining lemon curd and additional mascarpone frosting.
- 18. Add the final layer of cake on top, then smooth out the frosting around the sides of the cake.
- 19. Frost the outside of the cake, then use an offset spatula to create a striped pattern on the sides of the cake, if desired. Pipe swirls of frosting onto the top of the cake and decorate with candied peel.
- 20. Refrigerate well covered until ready to serve. I find that the cake is best when served a little chilled, but not cold. Cake should stay fresh when well covered for 2-4 days.
Instead of three layers of lemon, we subbed out one layer with Grapefruit Curd (use same process as lemon curd above but replace with Grapefruit) and another layer with our Pineapple Curd
Find our recipe for Pineapple Curd here
To truly simplify this recipe, you could swap out the cake recipe with a boxed lemon cake mix!