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This Royal Walnut Cake is as pretty as it is irresistibly delicious! The Russian buttercream frosting made with sweetened condensed milk is tantalizingly good! Keep an eye on the whisk that mixes the cream – someone else will surely try to lick it! Ha! Truly it’s delicious and like no other buttercream you’ve tried before!
This recipe is sponsored by Fisher Nuts and the cake is loaded with toasted walnuts which infuse the cake with rich flavor. I kept the decorations simple so even if you’re not super skilled in the cake decor department, YOU CAN DO THIS!!
You could simplify it even more by omitting the ganache and just coating in finely chopped nuts all around which would be beautiful but I thought the ganache was a nice touch for the holidays and a flowing layer of chocolate sauce never hurt anyone! 😉
Big thank you to our friends at Fisher Nuts for sponsoring this recipe – I trust Fisher brand because they don’t use preservatives and are non GMO project verified! Its the nuts and only nuts – just like you had popped them out of the shell yourself, minus all the effort and blisters. lol. You’ll recognize the right nuts by their bold blue “Fisher” brand bags.
Watch How to Make this Royal Walnut Cake:
Since the frosting is a buttercream, it is best served at room temperature when the frosting is soft. You can make this cake even 2 days in advance, cover and refrigerate and then bring to room temperature before serving. I have this same cake in the freezer (saving it for Christmas!) I just love make-ahead desserts and if you’re into that sort of thing, you’ll be surprised this dessert is also freezer friendly!
Everything about this cake is good. Simple, but so good! I hope it makes your holiday’s more merry and bright!
Royal Walnut Cake (VIDEO Recipe)

Ingredients
For the Walnut Cake:
- 2 cups Fisher Brand Walnuts, halves and pieces
- 6 eggs, (large), room temp
- 1 cup granulated sugar
- 1 cup all-purpose flour
- 1/2 tsp baking powder
For the Russian Buttercream:
- 3/4 cup sweetened condensed milk, (2/3 of a 14 oz can)
- 2 egg yolks, (large)
- 1 Tbsp water
- 1/2 tsp vanilla extract
- 1 1/2 cups unsalted butter , (3 sticks), softened at room temperature
For the Simple Cake Syrup (stir these ingredients together):
- 1/4 cup granulated sugar
- 1 cup warm water
- 3 Tbsp rum, I used Bacardi golden rum*
For the Chocolate Sauce/ Ganache:
- 4 oz semisweet chocolate chips, (1/4 lb by weight, or 2/3 cup by dry measuring cup)
- 1/2 cup heavy whipping cream
Instructions
How to Make the Royal Walnut Cake:
- Toast 2 cups walnuts on a dry skillet over medium/high heat until fragrant and golden (5 minutes), tossing often. Cool to room temperature then finely chop or pulse in food processor.
- Preheat oven to 350˚F. Line the bottoms of two 9" baking pans with parchment paper (do not grease the pan). In the bowl of a stand mixer fitted with whisk attachment, beat eggs for 1 minute until foam. With mixer on, add 1 cup sugar in a steady stream then beat on high speed 8 minutes. Batter will be fluffy and a thick ribbon will form when you lift up batter.
- Whisk together 1 cup flour and 1/2 tsp baking powder and sift it into the egg mixture in 3 increments. Gently fold in 1/4 of your cooled chopped nuts and divide batter evenly between 2 prepared pans. Bake right away in fully preheated oven at 350˚F for 23-28 min(I find it's perfect at 25 min). Let rest in the pans 5 min then run a thin spatula or knife around the edges of pan to loosen cake and transfer cakes to wire rack to cool completely to room temp.
How to Make Russian Buttercream:
- In a small sauce pan, off the heat, whisk together 2 egg yolks, 3/4 cup condensed milk, 1 Tbsp water, and 1/2 tsp vanilla until smooth.
- Place over low heat. Continue stirring frequently and stir constantly as it starts to thicken – DO NOT BOIL. When it’s ready, it will be the consistency of uncooked sweetened condensed milk. Total time on the stove: 5-7 minutes. Remove mixture from heat and let custard cool completely to room temp. It will thicken more as it cools.
- Beat softened butter in a mixer with whisk attachment for 5 minutes on high speed until white and fluffy, scraping down the bowl as needed. Add room temp custard mixture 1 heaping Tablespoon at a time, beating on high speed for a few seconds with each addition. Once all of the custard is incorporated, scrape down the bowl and beat another 2 minutes on high speed. Reserve 1 cup of cream and set aside (you'll use this to coat the top and sides of cake). Fold in 1/4 of your toasted cooled nuts into remaining big batch of cream.
Assembling the Walnut Cake:
- Line the edges of a cake platter with strips of parchment paper (this will make cleanup easier). Place first cake layer on the platter and spoon half of the syrup evenly over the top. Top with all of your walnut buttercream and spread evenly. Add the next cake layer and spoon the remaining syrup over the top. Coat the sides and top of the cake evenly with remaining 1 cup of buttercream.
- Apply the remaining finely chopped walnuts to the sides of the cake only, scooping it on with your hand and gently pressing for the nuts to adhere to the frosting. Now make your ganache (see below). Once ganache has rested 5-10 minutes, spread it evenly over the top of the cake, allowing some of it to drip down the sides of the cake. Let cake rest until ganache is set (you can refrigerate 30 min if desired).
How to Make Chocolate Ganache:
- Place 1/4 lb of chocolate chips in a heat-proof bowl. Pour 1/2 cup heavy cream into a small saucepan and bring to a simmer. When it's just at a uniform simmer, pour over the chocolate chips ensuring chocolate is fully submerged in cream. Cover bowl with lid and let sit at room temp 15 min then whisk until a silky chocolate sauce forms. Let ganache rest 5-10 min to thicken slightly but still be loose enough to pour over the cake and drip down the sides.
Notes
Nutrition Per Serving
If you make this recipe, I’d love to see pics of your creations on Instagram, Facebook and Twitter! Hashtag them #natashaskitchen
This is a sponsored conversation written by me on behalf of Fisher nuts. The opinions and text are all mine. I hope this beautiful walnut cake gives you great holiday inspiration!!
We are all about generous slices! I hope you and your family love this Royal Walnut Cake!
Super Yummy!! My family loves this cake. Thanks Natasha for these recipes.
That’s so great! It sounds like you have a new family favorite, Jasleen!
The recipe was easy to follow and it wasn’t as complicated as I thought, but I don’t think putting the walnuts in the batter is a good idea since it created a rye bread taste and was not that sweet. You really have to love walnuts to love this cake… overall not bad but won’t be making it again.
Hi Anastasia, I haven’t noticed a “rye bread taste” in this cake. Could your nuts possibly have been old or rancid?
Hi Natasha!
Can we use cashew nuts instead of walnuts in this recipe?
Thank you.
Hi Anjum, I haven’t tested that but I think it could work.
Thanks
Hello Natasha,
This recipe looks amazing. Can I add honey to this? If yes, how much? I’m trying to replicate a cake (called “Ideali”) I had at a Georgian restaurant. It was a delicious honey walnut cake with dulce de leche buttercream. It had three layers. Your recipe seems similar but without the honey.
Hi, since baking is so much a science, without experimenting, I can’t make that recommendation. Have you seen our Honey Prune Cake? It might be similar if there was honey in it.
Amazing! I made this yesterday. I followed the recipe almost exactly, substituting black walnuts for regular to amp the nutrition, and used heart shaped pans. I also covered top and sides of cake with reserved frosting and walnuts before ganache and walnut sprinkle on top. I would reserve more than just a cup of frosting next time, as the middle layer was very thick. It was messy, but so delicious. Thank you!
I bet this looks so darling in a heart-shaped pan! Thank yous o much for sharing this great feedback with us!
The Russian Buttercream
3/4 cup sweetened condensed milk or (2/3 of a 14 oz can)
3/4 of a cup is 6 oz.
2/3 of 14oz. can equals 9.3 oz.
Something wrong here.
HI Cameron, I added US measuring cup measurements and oz measurements and I suggest using one or the other. The can measurement of 14 oz can be a weight measurement which doesn’t equate to a US measuring cup measurement. I hope that helps.
I don’t think there is anything wrong there.
1 cup of sweetened condensed milk is about 10.8 oz, not 8 oz. It’s heavy and dense so it’s not the weight of water. so when we talk about 3/4 cup of sweetened condensed milk, we’re talking about 8 oz of sweetened condensed milk by weight.
you can look it up on google if you’d like.
Hi Natasha, this looks absolutely delicious! However I noticed the recipe doesn’t include butter or oil in the cake…wouldn’t it make the cake too dry or hard?
Hi, a classic sponge cake doesn’t call for butter or oil. Those would make the cake more likely to deflate.
Thanks Natasha, trying this recipe this weekend 🙂
I hope you love this recipe, Isha!
Im a a huge fan of your cooking videos!!! This cake is fantastic.
I’m wondering if you had a recepie for French Silk pie with oreo crust😊 or any Croatian dish?
Thank you so much for that wonderful compliment! I have not tried it, but it sounds delicious! Thank you for that suggestion!
wow! That looks so yummy and tempting will try….Thanks for sharing Natasha
It is so so good! I hope you try this recipe soon!
Thank you so much for the recipe. It was my first time baking a birthday cake especially for my husband since he loves walnuts. It did take me the “whole” day to make it with my 11 month old baby but it was so worth it!!! Everyone loved it Thank you once again.
Awww that’s the best! Thank you so much for sharing that with me! I’m all smiles
I love it!!!!
Great to hear!
Hi Natasha thanks for the recipe. I made this cake and instead of buttercream i used custard in between layers. I had made this buttercream once before and i found it too heavy. To be honest i did not find any significan flavor by adding walnuts to the sponge cake. I toasted them as described in the recipe but really did not make much a difference compared to your simple biskvit sponge cake. This walnut sponge cake was indeed more dry and did not rise much. Anyways, the idea of putting walnut in cakes is exciting. So next time i will just bake the simple sponge cake and put coarse walnuts and custard in between layers.
This was a crowd pleaser!! My mom hates overly sweet and the ganache paired so nicely with the sweetness of the buttercream. I was totally skeptical about pouring the rum and water syrup on top, but it was amazing and made it so moist! An excellent recipe, thanks so much!!
So great to hear that everyone loved it! Thanks for your excellent review, I appreciate it.
Hello Natasha, you are so pretty and bubbly. I enjoy watching your videos that are so easy to follow. I have tried your banana cupcakes and they were a hit! Thank you. I just want to ask if what cream can I use instead of heavy cream in chocolate ganache? Thank you so much.
Thank you Donna. I can’t think of any other substitute as heavy whipping cream is what worked with this recipe, I’m afraid it might turn runny if you try something else.
This is a great cake!
Just follow the directions exactly.
Once it’s all put together, it comes out beautifully.
Rita S
Hi Natasha
I made this cake and the batter was lovely, it looked great when it came out the oven. But it was VERY dry! I was sceptical about toasting the walnuts since they have a high fat content so usually don’t do this when baking with walnuts specifically. I was careful to fold the flour in also.
I tasted the sponge without the syrup and filling first, im just wondering if it relies on the syrup to bring it together and help with the moistness?
I may attempt again but skip toasting the walnuts to see what happens!
Hi Emily, this classic European sponge cake is supposed to be dry (there is no fat in the batter besides the egg yolk), so it relies on the syrup soaking for moisture.
It is really very delicious!!! I made it for my son’s birthday. Thank’s!
I’m so glad you enjoyed it! Happy Birthday to your son!
It came out so well. I was a bit sceptical to bake cake without Oil or Fat. Thanks for the recipe
You’re welcome and I am glad you enjoyed it! Thanks for the great review.
Natasha, the cakes don’t rise too high, do they? Thanks.
Hi Anna, I would say this cake has a standard rise.
If you want a strong walnut flavor, check your walnuts ahead of time and make sure they have a strong walnut flavor. I would also avoid the ganache. If those two steps don’t work, then this isn’t the dream walnut cake that I had in mind.
Walnuts are pretty mild in flavor – toasting them can also help to amp up their flavor.
Hi, can i use another brand??
Hi Marlene, of nuts? Ofcourse, you can use what you have on hand.