Basil Cake with Pistachio, Lime & White Chocolate

If you haven’t tried basil in pastry, you really should! It tastes amazing, especially in combination with pistachio and white chocolate. The result is a very fresh cake with a special twist!

Happy baking <3

Day 1

Pistachio Cake:

40 g white chocolate (28%)
80 g caster sugar
100 g eggs (approx. 2 medium eggs)
20 g almond flour
60 g pistachio flour
zest of 0.5 organic lime
a pinch of salt

Roast the pistachios at 175°C / 347°F for approximately 5–7 minutes. Let them cool and blend them into flour in a food processor.
Carefully melt the chocolate (for example in a bowl over a pan of simmering water) and set it aside in a bowl.
Separate the eggs, with the egg yolks in one bowl and the egg whites in another.
Whisk the egg yolks and sugar until light and airy.
Whip the egg whites to soft peaks.
Mix the chocolate, almond flour, pistachio flour, lime zest and salt into the egg yolk and sugar mixture. The batter will be thick.
Carefully fold the egg whites into the batter until it has a looser, even consistency.
Pour the batter into a springform pan or pastry ring (16 cm in diameter) lined with parchment paper.
Bake the cake at 175°C / 347°F for approximately 14–17 minutes until lightly golden.
Let the cake cool. Place it in a clean pastry ring (16 cm in diameter) lined with an acetate sheet at the sides and parchment paper at the bottom.

Tips & Notes:

If baking with pastry rings, use two rings of different sizes and place a piece of parchment paper in between to keep the batter contained.

Day 1

Pistachio Croustillant:

80 g roasted pistachio nuts without shell
100 g caster sugar
60 g white chocolate (28%)
2.5 tbsp dulce de leche / salted caramel sauce (store-bought or homemade)

Roast the pistachios at 175°C / 347°F for approximately 5–7 minutes.
Carefully melt the sugar to a golden caramel in a small saucepan. Immediately add the pistachios and pour the caramelized nuts onto a piece of parchment paper. Let them cool.
Blend two-thirds of the nuts into a pistachio flour in a food processor. Finely chop the rest of the nuts.
Carefully melt the chocolate (for example in a bowl over a pan of simmering water) and set it aside in a bowl.
Mix the pistachio flour, chopped pistachios, dulce de leche and a pinch of sea salt into the chocolate.
Spread the croustillant over the pistachio cake.
Let the cake set in the freezer while you prepare the next layer.

Tips & Notes:

Don’t chop the nuts too finely, as this will reduce the crunch effect.
Level the surface with a glass or a spoon.

Day 1

Lime Ganache:

170 g white chocolate (28%)
70 ml heavy cream (min. 35%)
5 tbsp lime juice
zest of 1 organic lime

Carefully melt the white chocolate (for example in a bowl over a pan of simmering water) and set it aside in a bowl.
Heat the heavy cream until almost boiling and remove it from the heat.
Pour the hot cream over the chocolate while stirring in the middle of the bowl with a rubber spatula.
Stir in the lime juice and lime zest.
Pour the ganache over the croustillant layer and freeze the cake overnight. It needs to be fully set before the mousse can be added.

Tips & Notes:

Only heat the cream until almost boiling, as cream that is too hot will seize the chocolate mixture.
Stir the mixture with a rubber spatula until glossy.

Day 2

Basil Mousse with White Chocolate:

2 gelatin sheets (1 sheet = 1.75 g, bloom value 240)
145 g white chocolate (28%)
65 ml lime juice
265 ml heavy cream (min. 35%)
20–25 large fresh basil leaves

Soak the gelatin in cold water for 5–10 minutes.
Carefully melt the chocolate (for example in a bowl over a pan of simmering water) and set it aside in a bowl.
Heat 65 ml of heavy cream and the lime juice until almost boiling and remove from the heat. Whisk in the gelatin.
Pour the hot mixture over the chocolate while stirring in the middle of the bowl with a rubber spatula.
Grind the fresh basil leaves into a fine purée with a mortar and pestle and mix the basil purée into the chocolate mixture.
Let it cool to lukewarm.
Whip 200 ml of heavy cream to soft peaks and gently fold it into the lukewarm chocolate mixture (if it is too hot, the cream may separate).
Prepare an 18 cm silicone mold (I used a Silikomart Universo mold) lined with an acetate sheet, as the cake will be taller than the mold. Make sure to place the acetate sheet at the bottom of the mold (the side that faces up).
Pour the mousse into the mold.
Gently press the frozen cake down into the basil mousse with the lime ganache facing down.
Freeze the cake overnight.

Tips & Notes:

Only heat the cream until almost boiling before pouring it over the chocolate, to avoid seizing the chocolate.
Whip the heavy cream to soft peaks, as overwhipped cream can result in a dense and grainy mousse.

Day 3

Glaze:

6 gelatin sheets (1 sheet = 1.75 g, bloom value 240)
150 g white chocolate (28%)
110 ml heavy cream (min. 35%)
50 g water
140 g caster sugar
150 g glucose syrup
white food coloring paste

Soak the gelatin in cold water for 5–10 minutes.
Finely chop the white chocolate and put it in a large plastic pitcher.
Heat the sugar, water, heavy cream and glucose syrup in a saucepan until almost boiling and remove from the heat. Whisk in the gelatin.
Pour the hot mixture over the chocolate in the pitcher and blend with an immersion blender (hold the immersion blender at an angle to avoid air bubbles). Add the white food coloring paste.
Cover the surface with cling film and let the glaze cool to 34–35°C / 93–95°F.
Take the cake out of the freezer just before glazing. Place it on a cooling rack with parchment paper underneath.
Pour the glaze over the frozen cake. Use two palette knives to remove the excess glaze from the bottom of the cake.
Place the cake on a plate and let it thaw in the fridge for approximately 6 hours.

Tips & Notes:

Let the hot mixture sit for 30 seconds so the chocolate can melt a little.
Insert the immersion blender in the jug at an angle to prevent creating air bubbles.
The cake needs to be completely frozen when the glaze is poured on. If the correct temperatures have been met, you’ll get a perfectly shiny mirror glaze.

Day 3

Chocolate Spirals and Chocolate Rings:

350 g white chocolate (28%)
green and blue food coloring powder
flowers (edible or secured with safety seal / edible wax)
glucose syrup

Cut three acetate sheets to the following sizes and place them on the kitchen counter:

Chocolate spiral 1: 59 cm × 10 cm
Chocolate spiral 2: 59 cm × 10 cm
Chocolate rings: 46 cm × 5 cm

Chocolate Spirals:

Put two pastry rings (2x 18 cm in diameter) in the fridge.
Cut two acetate strips for the spirals, each 59 cm × 10 cm.
Temper all the chocolate and add green and a little blue food coloring powder to get a mint green color.
Pour the chocolate over the two acetate sheets, level the surface with a small palette knife, lift the sheets off the counter and run your fingers along the edges to remove the excess chocolate. Leave them on the counter until almost set.
Wrap the spirals around the cold pastry rings and put them back in the fridge.
When the chocolate has set, peel off the acetate sheets.
Gently place the spirals around the cake.

Chocolate Rings:

Put a pastry ring (14 cm in diameter) in the fridge.
Use the remaining tempered chocolate.
Pour the chocolate over the acetate sheet and level the surface with a small palette knife.
Run a chocolate scraper over the sheet to create long grooves.
Leave the sheet on the kitchen counter until almost set.
Wrap the sheet around the cold pastry ring (with the chocolate facing inwards) and put it back in the fridge.
When the chocolate has set, remove the rings from the pastry ring and place a few on top of the cake.
Decorate with flowers secured with a little glucose syrup.

Cake Layer Overview:

Cake Base:

Pistachio Cake 20 minutes

Crunch:

Pistachio Croustillant 15 minutes

Creamy Elements:

Lime Ganache 15 minutes

Mousse:

Basil Mousse with White Chocolate 25 minutes

Decoration:

Glaze 20 minutes

Recipe Details:

Skill Level: Intermediate

Flavor: Basil, Lime, White Chocolate

Categories: Entremet Cakes, Seasonal

Yield & Time:

Servings / Yield: 8-10 people

Total Active Working Time: 1 hour & 35 minutes
Approximate hands-on time only. Excludes weighing ingredients, baking, cooling, freezing, resting and assembly time, as well as the time required to prepare chocolate decorations.

This recipe may include affiliate links.

Essential Equipment:

Immersion hand blender (I recommend Bamix)
Digital thermometer
Hand mixer
Pastry rings: 2 x 18 cm diameter, 1 x 16 cm diameter, 1 x 14 cm diameter
Silicone mold 18 cm diameter – Silikomart Universo or similar

troubleshooting guide

Cake Base

Issue	Cause	Fix
Cake sinks in the middle	Cake removed too early / center not fully set	Bake until the cake is set in the middle and evenly golden before removing from oven.
Cake is dry	Overbaked	Check early near the minimum bake time; remove once set and golden.
Cake is dense/heavy	Butter mixture not whipped enough	Beat butter, sugar, salt, (and marzipan if stated in the recipe) until fluffy before adding eggs.
Batter looks curdled after adding eggs	Eggs too cold or added too quickly	Use room-temperature eggs and add gradually while mixing.
Cake has greasy patches	Butter not properly emulsified	Cream butter and marzipan well first; mix until batter looks smooth and cohesive.
Cake is crumbly	Cake handled before fully cooled	Let the cake cool completely before moving, leveling, or assembling.
Cake bakes unevenly	Oven hot spots / ring not centered	Bake on the middle rack and place the ring centered on the tray.
Cake domes too much	Batter not leveled before baking	Level the batter surface in the ring before baking for a flatter layer.
Cake layer cracks when assembling	Cake not chilled/firm enough for handling	Cool completely and chill briefly before layering to keep it stable.
Pistachio flavor feels weak	Pistachios not roasted enough before blending	Roast as instructed, cool fully, then blend into flour for best flavor and aroma.
Pistachio flour turns oily/paste-like	Nuts blended too long	Pulse to a fine flour and stop as soon as it reaches flour-like texture.

Crunch

Issue	Cause	Fix
Crunch is too hard	Chocolate used has too high a cocoa percentage	Use a white chocolate around 28% cocoa / milk chocolate 33% for a softer crunch texture
Crunch is soft	Biscoff was heated together with the chocolate	Melt the chocolate first, then stir in Nutella off the heat
Crunch is soft	The crunch layer wasn't fully set before the next layer was added	Freeze the crunch layer completely before pouring on the next layer
Caramelized nuts taste bitter	Caramel is too dark	Only melt the sugar to a light golden caramel
Caramelized hazelnuts are soft after being mixed with the other ingredients	Nuts haven’t cooled before being chopped	Let the nuts cool completely before chopping them into smaller pieces

Creamy Element

Issue	Cause	Fix
Ganache is grainy	Chocolate was overheated or cream was too hot	Heat cream only to approx. 80-85°C Before pouring the hot cream over the chocolate, it should cool to approximately 50–55°C Pour gradually over finely melted chocolate and stir
Ganache separates	Emulsion (mixing heavy cream and chocolate) not formed due to temperature difference	Stir in the middle of the bowl using a spatula Use an immersion blender if needed to restore texture
Ganache is thick	Ganache wasn’t hand blended	Use an immersion blender to fully emulsify the ganache and achieve a smooth, fluid texture
Ganache is too thin	Too much cream, or ganache still warm	Allow the ganache to cool in the fridge or freezer to thicken naturally.

Mousse & Cream

Issue	Cause	Fix
Mousse is runny	Gelatine not activated, not enough chilling time, too weak gelatin	Ensure gelatine is fully soaked and dissolved; chill mousse thoroughly before unmolding, ensure bloom value matches recipe
Mousse is runny	Whipped cream too soft	Whip cream to soft peaks, but not too loose
Mousse is grainy or seized	Chocolate or cream overheated	Let ganache cool to 29–33°C before folding in whipped cream
	Cream added too quickly or too cold	Temper mixture gently, fold in cream in 2–3 batches
	Whipped cream overwhipped	Only whip to soft peaks
	Overmixing after folding	Fold just until incorporated, do not stir aggressively
Mousse collapsed after assembly	Mousse not set before layering	Allow mousse to partially set in mold before adding cake or inserts
Mousse collapsed after assembly	Insert (e.g., cake layer) pushed down too hard	Gently place insert, don't press down
Mousse is too firm / rubbery	Too much gelatine	Reduce gelatine or use a more precise scale
Mousse is too firm / rubbery	Gelatine not evenly dispersed	Fully melt and strain gelatine mixture before adding to ganache
Mousse has air bubbles / holes	Folding too aggressively or too fast	Fold gently and slowly to preserve even texture
Mousse has air bubbles / holes	Not tapping the mold after filling	Lightly tap the mold on the counter to remove air pockets
Mousse stuck to mold or cracked when unmolding	Unmolded too early or mold not properly prepared	Freeze until completely set

Decoration

Issue	Cause	Fix
Glaze is too thick	Temperature too low or glucose syrup too viscous	Reheat gently to 34–35°C Use a medium-viscosity glucose syrup
Glaze is too thin and won’t stick	Too hot, wrong gelatin ratio, or cake not frozen	Cool glaze to 34–35°C before pouring Ensure cake is fully frozen
Glaze has bubbles	Overmixing or improper blender	Use immersion blender with open-head design Avoid over-stirring when cooling
Glaze looks dull	Temperature too low or poor ingredient ratios	Pour at correct temp (34–35°C) Use proper gelatin-to-liquid ratio
Glaze is shiny first but turns dull later	Glaze applied too cold or syrup was too thick	Apply at proper temp Use the right glucose syrup texture
Glaze is too transparent	Glaze too hot	Cool to correct temp before pouring