Blueberry Cake

An elegant entremet featuring the sophisticated flavor of Earl Grey tea, perfectly complemented by sweet blueberries and a rich white chocolate mousse.

Yields: 10 Servings

Target Mold Size: 18 cm diameter silicone mold (e.g., Silikomart TOR mold)

DAY ONE: Component Preparation & Internal Insert

1) Blueberry Cake with Earl Grey & White Chocolate (Base Layer)

IngredientsWeight (g)Notes
Caster Sugar100 g 
Butter65 gMelted
White Chocolate (30-35% cocoa solids)75 gMelted
Egg (Whole)62.5 gApproximately $1 \frac{1}{4}$ large eggs
All-Purpose Flour75 g 
Lemon Zest3.8 gApproximately $\frac{3}{4}$ tbsp
Vanilla Paste3.8 gApproximately $\frac{3}{4}$ tsp
SaltPinch 
Frozen Blueberries32.5 gAverage weight
Earl Grey Tea (ground)7 gFinely ground loose leaf tea
Earl Grey Extract Sub-recipe:  
Whole Milk25 gHeated
Earl Grey Tea (for extract)8 gLoose leaf tea
Earl Grey Extract (needed)15.5 gApproximately 1 tbsp

Method

  1. Prepare Earl Grey Extract: Heat the 25 g of milk almost to the boiling point. Remove from heat, add the 8 g of Earl Grey tea, and let it sit for 15–20 minutes. Strain the mixture to yield approximately 15.5 g (1 tbsp) of extract.
  2. Melt Bases: Melt the butter and white chocolate together and set aside to cool slightly.
  3. Whip Eggs: Whisk sugar, eggs, lemon zest, vanilla paste, and salt until light and airy.
  4. Mix Batter: Stir in the cooled butter/chocolate mixture and the 15.5 g of Earl Grey extract. Grind the 7 g of Earl Grey tea into a fine powder and mix it into the batter along with the flour.
  5. Bake: Pour the dough into a lined 16 cm diameter ring. Place the frozen blueberries in the dough. Bake the cake at 160°C for approx. 24–28 minutes.
  6. Chill Base: Place the cooled cake in a clean 16 cm pastry ring lined with an acetate collar and parchment base.

2) Earl Grey Crunch (Layer 2)

IngredientsWeight (g)Notes
White Chocolate (30-35% cocoa solids)45 gMelted
Earl Grey Tea (ground)3.5 gFinely ground loose leaf tea
Feuilletine Flakes60 g 
SaltPinch 

Method

  1. Melt Chocolate: Carefully melt the white chocolate.
  2. Grind Tea: Grind the 3.5 g of Earl Grey tea into a fine powder.
  3. Combine and Layer: Mix the chocolate with feuilletine, Earl Grey powder, and salt. Spread the crunch layer on top of the cake.
  4. Freeze: Put the cake in the freezer.

3) Blueberry Ganache (Layer 3)

IngredientsWeight (g)Notes
White Chocolate (30-35% cocoa solids)170 gMelted
Heavy Cream (35% fat)31 gApproximately 30 ml
Blueberry Purée (strained)45 gFrom approx. 90 g blueberries

Method

  1. Prepare Purée: Boil blueberries and strain the juice to get 45 g of purée.
  2. Melt Chocolate: Melt the 170 g of white chocolate.
  3. Emulsify: Heat the heavy cream and blueberry purée almost to the boiling point. Pour over the chocolate while stirring until glossy. Hand blend for smoothness.
  4. Layer and Freeze: Pour the ganache on top of the crunch layer. Freeze the cake.

4) Blueberry Gel (Insert Top Layer)

IngredientsWeight (g)Notes
Gelatin Sheets (240 Bloom)2.2 gApproximately $1\frac{1}{4}$ sheets, bloomed
Caster Sugar13 g 
Blueberry Purée (strained)65 gFrom approx. 140 g blueberries

Method

  1. Soften Gelatin: Soak gelatin in cold water.
  2. Prepare Purée: Boil blueberries and strain the juice to get 65 g of purée.
  3. Heat Gel: Heat blueberry purée and sugar almost to the boiling point. Remove from heat and whisk in the gelatin.
  4. Layer and Freeze: Let the gel cool to room temperature. Carefully pour the gel on top of the blueberry ganache (pouring over the back of a spoon to prevent piercing the ganache). Freeze the cake overnight.

DAY TWO: Mousse & Entremet Construction

5) Earl Grey Mousse with White Chocolate

IngredientsWeight (g)Notes
Gelatin Sheets (240 Bloom)3.5 g2 sheets, bloomed
White Chocolate (30-35% cocoa solids)180 gMelted
Earl Grey Tea (for extract)30 gLoose leaf tea
Whole Milk (for extract)210 gHeated
Earl Grey Extract (heated)103 gApproximately 100 ml
Heavy Cream (to be heated)20.6 gApproximately 20 ml
Heavy Cream (to be whipped)185.5 gApproximately 180 ml, chilled

Method

  1. Prepare Earl Grey Extract: Heat 210 g of milk almost to the boiling point. Add the 30 g of Earl Grey tea and let sit for 15–20 minutes. Strain the mass to yield approximately 103 g (100 ml) of extract.
  2. Soften Gelatin: Soak gelatin in cold water.
  3. Melt Chocolate: Melt the white chocolate.
  4. Emulsify Base: Heat 103 g of the Earl Grey extract and 20.6 g of heavy cream almost to the boiling point. Remove from heat and whisk in the gelatin. Pour the hot mixture over the chocolate, stirring until combined. Allow to cool to lukewarm ($\approx 28^\circ\text{C}$).
  5. Whip and Fold: Whip 185.5 g of heavy cream to a light foam. Fold into the cooled chocolate base.
  6. Pour and Insert: Pour the mousse into an 18 cm silicone mold (e.g., Silikomart TOR mold) lined with an acetate collar. Chill in the refrigerator until partially set (forms a soft peak).
  7. Insert Core: Take the frozen 16 cm cake insert out of the freezer and gently press it into the mousse with the blueberry gel facing downwards.
  8. Freeze: Put the cake in the freezer overnight.

DAY THREE: Finishing & Decoration

6) Glaze & Velvet Spray

IngredientsWeight (g)Notes
Gelatin Sheets (240 Bloom)7.9 gApproximately $4\frac{1}{2}$ sheets, bloomed
White Chocolate (30-35% cocoa solids)115 gFinely chopped
Heavy Cream (35% fat)77.3 gApproximately 75 ml
Water40 g 
Caster Sugar115 g 
Glucose Syrup115 g 
Food Coloring PastePurple and White
White Velvet Spray 

Method

  1. Prepare Glaze: Follow the standard method (Bloom, Heat Syrup, Emulsify, Add Color, Cool) to prepare the glaze. Add purple and white food coloring paste. Let it cool down to 35°C–34°C.
  2. Glaze and Spray: Take the frozen cake out of the freezer. Place it on a cooling rack. Spray half of the cake with white velvet spray. Immediately pour the glaze over the other half of the cake.
  3. Clean and Thaw: Clean the excess glaze from the bottom. Place the cake on a plate and let it thaw in the fridge for approx. 6 hours.
  4. Decoration: Decorate with various purple flowers.
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