Pistachio Layer Cake with Chocolate Ganache

Pistachio Layer Cake with Chocolate Ganache

A showstopper three-layer pistachio sponge cake filled with chocolate ganache and pistachio buttercream — finished with a glossy chocolate mirror glaze. This is the Dubai chocolate aesthetic taken to celebration cake level.

Total time: 2.5 hours | Servings: 12 slices | Difficulty: Advanced

Ingredients

For the pistachio sponge (3 layers):

• 300g (2.5 cups) all-purpose flour
• 200g (1 cup) granulated sugar
• 100g (1/2 cup) pistachio flour or finely ground pistachios
• 3 tsp baking powder
• 1/2 tsp salt
• 240ml (1 cup) whole milk
• 180ml (3/4 cup) neutral oil
• 3 large eggs
• 2 tsp vanilla extract
• 1 tsp almond extract
• 3-4 drops green food coloring (optional)

For the chocolate ganache filling:

• 300g dark chocolate (65-70%), chopped
• 250ml heavy cream
• 2 tbsp butter

For the pistachio buttercream:

• 230g (1 cup) unsalted butter, room temperature
• 400g (3.5 cups) powdered sugar
• 100g pistachio cream
• 3-4 tbsp heavy cream
• Pinch of salt

For the chocolate mirror glaze:

• 150g dark chocolate, chopped
• 120ml heavy cream
• 2 tbsp glucose syrup or light corn syrup
• 1 tbsp neutral oil (for shine)

Instructions

Bake the Pistachio Sponge

1. Preheat oven to 350F (175C). Grease and line three 8-inch round cake pans.
2. Whisk together flour, sugar, pistachio flour, baking powder, and salt in a large bowl.
3. In a separate bowl, whisk milk, oil, eggs, vanilla, and almond extract.
4. Pour wet ingredients into dry ingredients and stir until just combined. Add green food coloring if using.
5. Divide evenly among three pans.
6. Bake 22-26 minutes until a toothpick inserted in the center comes out clean.
7. Cool in pans 10 minutes, then turn out onto wire racks. Cool completely before assembling.

Make the Chocolate Ganache Filling

1. Heat cream until steaming. Pour over chopped chocolate. Let sit 1 minute.
2. Add butter. Stir from the center outward until smooth.
3. Let cool at room temperature for 1 hour, stirring occasionally, until spreadable.

Make the Pistachio Buttercream

1. Beat butter with an electric mixer on high speed for 3-4 minutes until pale and fluffy.
2. Reduce to low speed. Add powdered sugar 1 cup at a time.
3. Add pistachio cream, salt, and heavy cream. Beat on high for 2 minutes until light.
4. Adjust consistency: more cream for softer, more powdered sugar for stiffer.

Assemble the Cake

1. Place one sponge layer on a cake board or plate.
2. Spread a generous layer of ganache filling (about 5mm thick).
3. Pipe a border of pistachio buttercream around the edge to contain the ganache.
4. Add second sponge layer. Repeat ganache and buttercream border.
5. Place final layer on top.
6. Apply a thin crumb coat of pistachio buttercream over the entire cake. Refrigerate 30 minutes.
7. Apply second coat of pistachio buttercream, smoothing with a bench scraper.
8. Refrigerate 1 hour until the buttercream is firm.

Apply the Mirror Glaze

1. Heat cream until steaming. Pour over chopped chocolate and glucose syrup.
2. Add oil. Stir until smooth. Cool to 35-38C.
3. Pour glaze over the center of the chilled cake, letting it flow over the sides naturally.
4. Let glaze set for 10 minutes before moving.

Decorate

• Pipe rosettes of remaining pistachio buttercream around the top edge
• Scatter crushed pistachios over the rosettes
• Apply gold leaf sheets to the sides
• Dust with gold luster powder

Storage

Store covered at room temperature for up to 2 days. Refrigerate for up to 5 days — bring to room temperature for 1 hour before serving (cold buttercream is dense and less flavorful).

Frequently Asked Questions

Can I use store-bought pistachio flour? Yes — Anthony's Goods and Bob's Red Mill both make pistachio flour. Alternatively, process raw unsalted pistachios in a food processor until finely ground.

How do I get flat cake layers? Use cake strips soaked in cold water wrapped around pans during baking. Level any domed layers with a serrated knife after cooling.

Can I make this without the mirror glaze? Yes — the cake is complete with just pistachio buttercream. The mirror glaze is purely for presentation.