This raspberry limoncello layer cake is what dessert dreams are made of! It's a limoncello cake with raspberry sauce, covered in a decadent limoncello buttercream. Make it for your next birthday or event. It's bound to make a statement!
Preheat oven to 350°F. Butter 3 x (8-inch) round cake pans, then flour the pans.
In a stand mixer with the wire whisk, beat butter and sugar together until fluffy.
In another large bowl, combine flour, baking powder, baking soda, salt, and zest.
Add flour mixture to butter mixture in stand mixer in thirds, alternating with milk, beginning and ending with flour mixture. Add limoncello, beating until smooth.
In a separate mixing bowl using a hand mixer, beat egg whites until stiff peaks form. Fold egg whites into batter.
Divide batter evenly among prepared pans.
Bake until a wooden pick inserted in center comes out clean, 18 to 22 minutes. Let cool in pans for 10 minutes. Remove from pans, and let cool completely on wire racks.
Make the raspberry sauce
While cake is in the oven, combine all filling ingredients in a small saucepan set over medium heat. Bring to a simmer, stirring constantly, and simmer until mixture is very thick and clings to a wooden spoon (about 10 minutes). Scrape into a small bowl and refrigerate until cool enough to spread.
Make the Limoncello Buttercream
Combine the sugar and egg whites in a medium heatproof bowl and place over a pan of simmering water.
Whisk the sugar mixture constantly over heat until the sugar is dissolved and the mixture looks smooth and shiny, about 3 minutes.
Remove mixture from heat and pour into a stand mixer bowl. Whisk on medium speed for about 5 minutes until the mixture has cooled and stiff peaks have formed.
Switch to the paddle attachment and with the speed on low, add the butter a few pieces at a time, beating until smooth.
When all the butter has been added, beat the buttercream on medium-high speed for about 6-10 minutes until it is very thick and smooth. Add in the limoncello and beat until combined. Add in the lemon extract. Use to layer the cake right away, as the buttercream will be easier to work with.
Assemble the cake
Level the cakes by cutting off the rounded tops.
Add buttercream to a piping bag fitted with a tip.
Place one layer of cake on a cake stand or serving dish. Pipe ¼ of the buttercream, smooth out the buttercream with a spatula, then top the buttercream with ½ of the raspberry sauce. Top with the next layer of cake and repeat.
Place the third and final cake on top, and cover the entire cake with remaining buttercream. Decorate as you wish, with fresh fruit, fresh flowers, or both.
Notes
Use the buttercream to assemble the cake as soon as the buttercream is ready - if you wait too long, it will be hard to work with.
Measure the butter for the cakes and buttercream with the markers on the package of butter. If you cut up the butter and use a measuring cup, you will not get an accurate measurement and your buttercream will be runny.
Level the cake tops to ensure your cake turns out even, and it's easier to stack this way as well.
When stacking the second layer of cake, turn it upside down, (the bottom of the cake will become the top), and place it on top of the buttercream/raspberry sauce. This helps to ensure a more even shape for the cake. Do this for the 3rd layer as well.
The best way to add the buttercream to the layers of the cake is to pipe it. This will ensure you get a thick amount of buttercream on the layer, and that the amount of buttercream is the same on each layer.
When spreading the raspberry sauce, don't spread it to the edge of the cake. This will ensure that the raspberry sauce doesn't bleed into the outer layer of the cake.
This cake did not require a crumb coat, since it's not a crumbly cake.