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Square image of an overhead shot of Walnut Torte

Hungarian Walnut Cake with Mocha and Espresso Icing


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  • Total Time: 1 hour and 45 minutes
  • Yield: 10-12 slices 1x

Description

Rich layers of Hungarian Walnut Torte are paired with espresso and mocha buttercream for a decadent dessert perfect for the holidays or any special occasion.


Ingredients

Units Scale

Cake 

  • 6 large egg yolks (room temperature)
  • 2 cups (400 grams) granulated sugar
  • 2 cups (240 grams) all-purpose flour
  • 3 teaspoons (12 grams) baking powder
  • 1/2 teaspoon kosher salt
  • 1/2 teaspoon espresso powder
  • 1 cup (240 ml) cool brewed black coffee
  • 1 cup (100 grams) walnuts, very finely chopped
  • 1 teaspoon (5 ml) vanilla extract
  • 6 large egg whites, whipped to stiff peaks

Espresso & Mocha Buttercreams (for filling and top)

  • *See Note 1
  • 1 cup (227 grams) unsalted butter, softened
  • 2 1/2 cups (320 grams) powdered sugar
  • 1 teaspoon (5 ml) vanilla extract
  • 1 tablespoon instant espresso powder, dissolved in 1 tablespoon hot water
  • 1/8 teaspoon fine salt
  • 1 oz (30 grams) bittersweet chocolate (60%), melted and cooled
  • 1-2 teaspoons milk or cream (optional, for adjusting frosting texture)

Instructions

Cue up the Episode!

Make sure you listen to Lynn's episode of The Storied Recipe Podcast, "The Best Mother-In-Law and Her Hungarian Walnut Torte" while you make her amazing Hungarian Walnut Cake.

Make the Recipe

Make the Batter

  1. Preheat oven to 375°F (190°C). 
  2. Grease two 8” or 9” round cake pans and set aside.
  3. In a large bowl, beat the egg yolks and granulated sugar until creamy and pale (about 3–5 minutes).
  4. In a separate bowl, whisk together the flour, baking powder, kosher salt, and espresso powder.
  5. Gradually add the dry ingredients to the egg yolk mixture in two additions, alternating with the brewed coffee, stirring until smooth.
  6. Stir in the finely chopped walnuts and vanilla extract.
  7. In a clean bowl, beat the egg whites until stiff peaks form.
  8. Gently fold the whipped egg whites into the batter in three additions, being careful not to deflate the mixture.

Bake the Cakes

  1. Divide the batter evenly between the prepared pans and smooth the tops.
  2. Bake for 25–30 minutes, or until the cakes spring back to the touch and a toothpick inserted in the center comes out clean.
  3. Allow cakes to cool completely in the pans before removing.

Make the Espresso Buttercream

  1. In a mixing bowl, beat the softened butter until light and fluffy (about 2–3 minutes).
  2. Gradually add the powdered sugar, beating well between each addition.
  3. Stir in the vanilla extract, dissolved espresso powder, and salt. Beat until smooth and airy.

Make the Mocha Frosting

  1. Set aside 1 ¾ to 2 cups of the espresso buttercream.
  2. Stir the melted and cooled bittersweet chocolate into this portion.
  3. If needed, add 1–2 teaspoons of milk or cream to reach a smooth, spreadable consistency.

Optional: Prepare Sugared Walnuts

  1. Combine walnuts, sugar, and a splash of water in a skillet over medium heat.
  2. Stir constantly for 2–3 minutes until sugar melts and walnuts are glossy and golden.
  3. Transfer to parchment paper to cool and separate.

Assemble the Cake

  1. Once the cakes are completely cool, slice horizontally if you want thinner layers (optional).
  2. Place one cake layer on your serving plate. Spread a generous layer of espresso buttercream over the top.
  3. Add the second cake layer and repeat with espresso buttercream.
  4. Spread the mocha buttercream on the top layer only — this cake is assembled as a naked cake, so sides are left unfrosted to showcase the layers.
  5. Optionally sprinkle with sugared walnuts for texture and a beautiful finishing touch.

Notes

  • Note 1: These proportions are for a light icing to cake ratio. If you have more layers or just want a higher ratio, increase the frosting by half while keeping the other proportions the same (so 1 1/2). For reference, my images reflect two 9-inch cakes cut in half (4 layers) and I used a little less than 1 and 1/2 frosting batches to frost my layer cake. Note that I also added a little extra espresso powder, which is the flecks you see in the icing.
  • Note 2: Check out Lynn's recipe on her own website, Family Tree Foodie. For reference, her images are of two 6-inch cakes cut in half (also 4 layers) and 1/2 of a batch of frosting.
  • Prep Time: 45 minutes
  • Cook Time: 1 hour