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Chocolate Pistachio Cake with Pistachio Ganache

Elowen

Elowen

July 9, 2026

Rich dark chocolate cake layered with pistachio ganache and finished with toasted crushed pistachios.

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Sliced chocolate pistachio cake on a white cake stand, dark chocolate layers visible with green pistachio ganache and crushed pistachios on top.

How the Chocolate and Pistachio Layers Stay Distinct

  • Hot coffee deepens the cocoa flavour in the sponge without turning the finished cake into a coffee-flavoured dessert.
  • Finely chopped pistachios add nutty flavour and texture through the chocolate sponge without making the crumb excessively heavy.
  • The cakes are cooled completely before the ganache goes on, so the filling stays where it is spread instead of softening against warm layers.
  • White chocolate gives the pistachio ganache a smooth, creamy base, while pistachios keep its flavour connected to the cake rather than making it taste like plain white-chocolate frosting.

What Builds the Chocolate Sponge and Pistachio Ganache

The cake combines a cocoa-based sponge with chopped pistachios, while white chocolate, cream and pistachio form the ganache used between and around the layers.

  • Plain flour (all-purpose flour) – Provides the structure for the sponge while keeping the crumb soft and tender.

  • Granulated sugar – Sweetens the sponge, contributes to a moist crumb and balances the deep cocoa notes.

  • Unsweetened Dutch-process cocoa powder – Dutch-process cocoa provides the deep chocolate colour and flavour of the sponge and has a smoother, less acidic taste than natural cocoa.

  • Baking powder + 1½ tsp bicarbonate of soda (baking soda) – Work together to give the cake a light, even rise.

  • Salt – Balances the sweetness and enhances the chocolate flavour.

  • Large eggs, room temperature – Room-temperature eggs combine more easily with the other ingredients and help give the cake an even crumb.

  • Whole milk – Whole milk adds moisture and richness to the sponge.

  • Vegetable oil – Oil-based chocolate cakes stay soft and moist.

  • Vanilla extract – Adds a subtle background flavour that complements the chocolate and pistachio.

  • Hot brewed coffee (or near-boiling water) – The hot liquid blooms the cocoa and strengthens the chocolate flavour without making the cake taste strongly of coffee.

  • Heavy cream – Forms the base of the pistachio ganache, producing a smooth, spreadable texture.

  • White chocolate, chopped – White chocolate provides sweetness and structure to the ganache while allowing the pistachio flavour to remain prominent.

  • Unsweetened pistachio paste – Unsweetened pure pistachio paste gives the ganache its nutty flavour and pale green colour. Avoid substituting a sweetened pistachio spread unless the recipe has been adjusted for the extra sugar and fat.

  • Toasted pistachios, finely chopped – Finely chopped toasted pistachios add crunch and reinforce the pistachio flavour.

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How to Make Chocolate Pistachio Cake

Step 1: Preheat & Mix Batter Base

Preheat the oven to 175°C (350°F). Grease two 23cm (9-inch) round cake tins and line the bases with baking parchment. In a large mixing bowl, whisk together the flour, sugar, cocoa powder, baking powder, bicarbonate of soda and salt. Add the eggs, milk, oil and vanilla extract and mix on medium speed for 2 minutes until smooth.

Step 2: Add Hot Coffee & Bake

With the mixer on low speed, slowly pour in the hot brewed coffee. The batter will become thin, which ensures a moist cake. Divide the batter evenly between the prepared tins and bake for 30–35 minutes, or until a skewer inserted in the centre comes out clean or with a few moist crumbs. Cool in the tins for 10 minutes, then turn out onto wire racks to cool completely before frosting.

Step 3: Make Pistachio Ganache

For the ganache, heat the cream in a small saucepan over medium heat until just steaming around the edges; do not boil. Pour the hot cream over the chopped white chocolate and let it sit for 2 minutes. Whisk gently until melted and smooth, then stir in the pistachio paste. Leave the ganache to cool for about 20 minutes, stirring occasionally, until it thickens to a spreadable consistency.

Step 4: Assemble & Garnish

Once the cakes are completely cool, place one layer on a serving plate and spread an even layer of pistachio ganache on top. Place the second cake layer on top, then spread the remaining ganache over the top and sides. Scatter the toasted chopped pistachios over the cake. Chill in the fridge for 15–20 minutes before slicing to help achieve clean layers.

Cool the Layers Before You Touch the Ganache

The cake layers need to be completely cool before they are filled or covered. Even slight warmth can soften the ganache and make the layers more difficult to stack neatly. The ganache should be smooth and spreadable rather than runny; if it feels too loose after mixing, give it time to cool and thicken before assembling the cake. When spreading it between the layers, use an even layer rather than pushing a large amount towards the edges, then add the outer coating once the cake is stacked securely.

Storing the Finished Cake

Store the cake in an airtight container in the fridge for up to 5 days, as the ganache contains cream. Allow refrigerated slices to stand at room temperature briefly before serving so the cake and ganache soften slightly.

Individual slices can be wrapped and frozen for up to 2 months. Thaw overnight in the fridge, then bring to room temperature before serving.

Ways to Adjust the Pistachio Finish

For a stronger pistachio presence, add extra finely chopped or lightly toasted pistachios over the finished ganache. If you prefer more contrast between the dark cake and the pale filling, keep the outer decoration simple rather than covering every surface with nuts. A light sprinkling of flaky sea salt can sharpen the chocolate and white-chocolate flavours, while a small amount of extra chopped pistachio adds texture without changing the cake itself.

Cutting and Serving the Cake

For cleaner slices, use a sharp knife and wipe the blade between cuts, particularly where the ganache is thick. If the cake has been refrigerated, let each slice stand briefly at room temperature before eating so the sponge and ganache lose some of their chill. The cake is rich enough to serve on its own, although a small spoonful of softly whipped cream or a few fresh berries can be added if you want a lighter contrast on the plate.

Chocolate Pistachio Cake with Pistachio Ganache

Chocolate Pistachio Cake with Pistachio Ganache

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By Elowen Vance•Medium

Rich dark chocolate cake layered with pistachio ganache and finished with toasted crushed pistachios!

Prep Time
25 mins
Cook Time
35 mins
Total Time
1 hr
Yield / Servings
12 Servings

Equipment Needed

  • Two 23cm (9-inch) round cake tins
  • Mixing bowls
  • Whisk & electric mixer
  • Saucepan for ganache
  • Wire cooling racks

Ingredients

Adjust yield quantities or check items off as you prep.

Scale:

Instructions

  1. Preheat oven to 175°C (350°F). Grease and line two 23cm (9-inch) round cake tins. Whisk together the dry ingredients, then add eggs, milk, oil and vanilla; mix for 2 minutes until smooth.
  2. Slowly pour in the hot coffee. Divide between tins and bake for 30–35 minutes, or until a skewer comes out clean. Cool in tins for 10 minutes, then cool completely on wire racks.
  3. Heat cream until steaming, pour over chopped white chocolate and let sit 2 minutes. Whisk until smooth, then stir in pistachio paste. Cool for about 20 minutes until spreadable.
  4. Spread ganache between the cooled cake layers and over the top and sides. Scatter with toasted chopped pistachios. Chill for 15–20 minutes before slicing.

Nutrition Information

Per ServingServing: 1 slice
Calories
480kcal
Total Fat
24g
Protein
8g
Carbohydrates
58g
Dietary Fiber4g
Total Sugars42g
Sodium320mg
Calcium110mg
Iron3mg

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Frequently Asked Questions

Pure pistachio paste is available from specialist food shops and online retailers. You can also make it by processing shelled pistachios until smooth, although the texture will depend on the nuts and equipment used.
It may still be too warm. Let it cool and thicken before assembling the cake. If the ingredient ratios were changed, the final consistency may also be affected.
Yes. Bake and cool the cake layers completely, then wrap them well and store them until assembly. Add the pistachio ganache only when the layers are completely cool.

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Chocolate Pistachio Cake with Pistachio Ganache